Develop Bugs

[Q] HDMI cable

Anyone know where one can be brought? also why have I read stuff about the s2 having mini usb? it doesn't it has the same propriety connector as the galaxy s.

It's MHL. It's the supposed new 'standard' for connectivity. I think most devices are using that connection nowadays. Last I heard was Clove saying the MHL adapters won't be out until June.

DVC1985 said:
It's MHL. It's the supposed new 'standard' for connectivity. I think most devices are using that connection nowadays. Last I heard was Clove saying the MHL adapters won't be out until June.
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really? so the original galaxy s had mhl as well? Any suggestions on what to do with my fancy new phone? so far apart from being super quick it just seems like a sleaker bigger galaxy s, I cant think of anything my galaxy s couldn't do :S
Oh I know I'm gonna see if the wii mote works on this thing

badasschris said:
really? so the original galaxy s had mhl as well? Any suggestions on what to do with my fancy new phone? so far apart from being super quick it just seems like a sleaker bigger galaxy s, I cant think of anything my galaxy s couldn't do :S
Oh I know I'm gonna see if the wii mote works on this thing
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I can't find any evidence that it did.
http://en.wikipedia.org/wiki/Mobile_High-definition_Link
It's the new standard, but that doesn't mean older devices support it. The SGS2 is one of the first AFAIK

But nothing on the market will currently work? HDMI out from a mobile is just supercool!

I have both an sgs1 and sgs 2, my charger fits the micro usb (the only i/o connector) on the phones, perfectly

The connectors should be the same on the S1 and S2, but only the S2 is MHL compatible.
I think MHL can use any 5 pin connector to send an HDMI signal while receiving power for charging.
I'm not sure if you'll be able to use the MHL HDMI out and USB at the same time, but I hope this is possible.
I'm also guessing that the adaptor will need to be a clever one with circuitry rather than a passive adaptor. Does anyone know if this will definitely be the case, and if so I'd imagine it'll have cost implications! Hope I'm wrong and a passive adaptor is possible

Coming from a LG Optimus 2x, that came with a Micro USB ---> HDMI cable. These are available from Ebay for a GBP 10 - would these work?

Yea guessing its just MHL compatible as the old port was usb compatible. Thats annoying, with all the talk of this new standard usb-hdmi port I was assuming it would use a standard connector and not a proprietary one.
It stupid really if all manufacturers used the same connector we wouldn't have to have multiple chargers/docks/cables

You can't use the USB port for MHL and USB functions at the same time, this is confirmed (if you search for MHL at youTube there is a great video with a person from the MHL consortium explaining it).
To badasschris: this isn't a proprietary port. Samsung, Nokia, Sony, HTC, Toshiba, and quite a few other partners are involved with it, it seems likely to become the standard for mobile devices (iPhone aside, I am sure Apply will continue to push their proprietary ports).

NZtechfreak said:
You can't use the USB port for MHL and USB functions at the same time, this is confirmed (if you search for MHL at youTube there is a great video with a person from the MHL consortium explaining it).
To badasschris: this isn't a proprietary port. Samsung, Nokia, Sony, HTC, Toshiba, and quite a few other partners are involved with it, it seems likely to become the standard for mobile devices (iPhone aside, I am sure Apply will continue to push their proprietary ports).
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Are you absolutely sure it isnt proprietary? Why I am getting confused is because it has the same port as the galaxy s1 and I heard nothing about that being a standard port and you always have to buy a samsung charger not a [standard port] charger e.g. mini usb charger for any devices which have mini usb. So you are saying at some point the other manufactorers will have the same port and I will be able to use my galaxy s charger to charge them?

Galaxy S is a standard micro USB port, and lacks the MHL connection, its not proprietary at all, I use several non-Samsung cables to charge the phone in my car and from PCs. Most manufacturers, Apple excluded, use micro USB charging now.
The port in the Galaxy SII is not the same as the Galaxy S, as it has MHL connectivity in addition, but its function as a micro USB port for mass memory and charging is perfectly standard, and doesn't require special cables or connectors of any kind.

NZtechfreak said:
Galaxy S is a standard micro USB port, and lacks the MHL connection, its not proprietary at all, I use several non-Samsung cables to charge the phone in my car and from PCs. Most manufacturers, Apple excluded, use micro USB charging now.
The port in the Galaxy SII is not the same as the Galaxy S, as it has MHL connectivity in addition, but its function as a micro USB port for mass memory and charging is perfectly standard, and doesn't require special cables or connectors of any kind.
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lol I had to thank you there I've been a right plonker. I remember seeing someone say the origional galaxy s was micro usb and then when I saw it I thought that't not micro usb. It just clicked I have been getting micro and mini usb confused. When anyone said micro I immediately assumed mini
Glad I got that sorted.

Is it possible to buy an MHL to HDMI cable? Where?

You can't use the USB port for MHL and USB functions at the same time, this is confirmed (if you search for MHL at youTube there is a great video with a person from the MHL consortium explaining it).
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That sucks. I was hoping to look into making a tablet dock that used a USB capacitive touch screen & HDMI output for the screen.
A laptop dock using Bluetooth for the keyboard and HDMI for the screen would still be possible, or a tablet that used Bluetooth for the touch-screen.
This phone is powerful - it's annoying not to be able to use the hardware for more than just a phone.
I reckon Motorola is thinking along the right lines with the Atrix, and I hoped other manufacturers would be too, but this combined port indicates Samsung are probably not.

DavidMc0 said:
That sucks. I was hoping to look into making a tablet dock that used a USB capacitive touch screen & HDMI output for the screen.
A laptop dock using Bluetooth for the keyboard and HDMI for the screen would still be possible, or a tablet that used Bluetooth for the touch-screen.
This phone is powerful - it's annoying not to be able to use the hardware for more than just a phone.
I reckon Motorola is thinking along the right lines with the Atrix, and I hoped other manufacturers would be too, but this combined port indicates Samsung are probably not.
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Plus you have the added fact that samsung like to mess with bluetooth meaning many devices wont work with it. I really hope the bluetooth situation gets fixed somehow as this device paired with a screen and a bluetooth keyboard/mouse and game pad gives you a portable computer / games console. without it its just an amazing phone

This should work perfectly with bluetooth mouse and keyboard, my SGSI does. It should also work with a Zeemote, unfortunately it doesn't have enough buttons to be that good for using in emulators.

I can confirm that the igo stowaway bluetooth keyboard works fine w/the SGS2 in case anyone's curious

aonanodad said:
Is it possible to buy an MHL to HDMI cable? Where?
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Good question. That's what we are all looking for.

So far i have only seen two places selling them Clove and Expansys are doing it 2 £24.99 they ar egetting them in on the 28th May

Which HDMI cables work with HOX?

hi guys, which HDMI cables are compatible with the HOX?
I heard the EVO 3D one is
Also do the HDMI leads also charge the HOX? Cheers
Sent from my HTC One X using Tapatalk 2

http://www.amazon.fr/HTC-99H10395-0...on/dp/B004Z8EQ4Y/ref=?ie=UTF8&m=ATRDKIXG8BGKU

Many thanks, any cheaper alternatives around at all?

I've just gone for this:
http://www.amazon.co.uk/gp/product/B007K8NN9U/ref=oh_details_o00_s00_i00
Will probably get it tomorrow. Tried a similar one yesterday at my mate's house and it worked fine on his 19' monitor.

That's awesome, cheers fella

siaosi said:
I've just gone for this:
http://www.amazon.co.uk/gp/product/B007K8NN9U/ref=oh_details_o00_s00_i00
Will probably get it tomorrow. Tried a similar one yesterday at my mate's house and it worked fine on his 19' monitor.
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This looks very affordable. Question though, can it be used to watch let's say catch up tv, or netflx as well?, cause at the moment am working away from home, and we have television that supports hdmi, but no digital service, so was hoping to show this off, to my colleagues.

So would this be like using the Media Link but not wirelessly?

wizzkidd said:
So would this be like using the Media Link but not wirelessly?
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I think so, i ordered one yesterday so ill make a little video when it arrives, show how it works

So got it today, already used it in the 40' HDTV we have in the office and works fine. But it does need a USB connection also for power, which is fine.
I played a 720p movie on the phone and it looked fine, the picture lost a bit quality, but it works.
Can't complain for £6! Does the job
---------- Post added at 05:53 PM ---------- Previous post was at 05:53 PM ----------
wizzkidd said:
So would this be like using the Media Link but not wirelessly?
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I haven't used the media link, so I don't know the picture quality. But the adaptor I bought works fine

I'm using the bizlink mhl cable on a Samsung le40a559 and it works fine IF you set it up right.
1. Connect HDMI to tv.
2. Connect HDMI to mhl.
3. Connect power to mhl.
4. Wait for tv to search for signal.
5. Connect mhl to phone.
If you connect in any other order it seems to cause headaches at least mine did. Outputting in 1280 x 720p @ 60hz. Noice.
All I need now is root so I can pair my ps3 sixaxis and Shadowgun is getting pwnd.
Sent from my HTC One X using xda premium

I picked up an mhl cable for the samsung galaxy series of phones from ebay last week, charges the one x and plays everything from the screen straight to the TV via HDML, works great. Tried posting a link but less than 8 posts but worth looking on ebay for though.

i'm curious if anyone has found an mhl adapter that will working without needing power.

Berserk87 said:
i'm curious if anyone has found an mhl adapter that will working without needing power.
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i don't think its possible. the port on any hdmi output (ie bluray etc) would need to have some sort of power source, the mhl doesnt output enough (if any) power to run the hdmi, hence the requirement for a separate power source.
i use my portable charger to run it, works a treat.

Iphones are able to output hdmi with just an adapter, so i dont see why an one x wouldnt be able to.

Berserk87 said:
i'm curious if anyone has found an mhl adapter that will working without needing power.
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In order to do this you need an mhl capable TV. Any TV with HDMI will display video but only TVs certified as mhl capable will charge the device via HDMI.
Sent from my HTC One X using xda premium

and if you have a tv with a usb port for flashdrives or external drives next to the hdmi port, would that give power? maybe the output is too low, but it might at least keep the battery from draining right? cause then i could use a short usb cable and avoid having a cable coming from another source. I hate cables but don't trust the media link thing to work well, i've read that it uses some kind of compression for video, and that is a big no no.

I bought a cheap MHL from ebay and works perfect
Cannot work without power supply...

siaosi said:
I've just gone for this:
http://www.amazon.co.uk/gp/product/B007K8NN9U/ref=oh_details_o00_s00_i00
Will probably get it tomorrow. Tried a similar one yesterday at my mate's house and it worked fine on his 19' monitor.
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Ordered one as well - should have next week so i'll report back how it works out. Was looking for something with a longer cable but at this price cant complain

imy300 said:
Ordered one as well - should have next week so i'll report back how it works out. Was looking for something with a longer cable but at this price cant complain
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Did yours work? I bought the same one and it doesn't work, TV recognises the MHL device but the phone doesn't.

Motorola Atrix Lapdock and Galaxy S III

Has anyone connected their Galaxy S III up to a Motorola Atrix Lapdock?

If I remember well, the Motorola lapdock uses a HDMI plug to connect with the Atrix.
GS3 doesn't have one, you should get a MHL/HDMI convertor. Don't know if it'll work as a native HDMI plug will do.
If someone have both, it could be intereting to see if that work

So I'm going to dust this thread off a bit because this is the project I'm looking to work on -
I've ordered an Atrix Lapdock for my Bionic (very simple mod to dock the bionic) but as my personal phone is an S3, I'd like to use the lapdock with it primarily while still having the option to dock the bionic while on the go (I carry both phones). (While I'm at it, I'll probably look to get an hdmi micro extension cable and usb-micro-male to usb-A-male extension and try and use the lapdock as the base station for the Samsung Slate 7 PC i barely use since the interface is so poor)
Here's what I've gathered by reading various threads.
Lapdock:
The Lapdock will work with any HDMI source as seen in other threads (ie connecting to a PS3 via hdmi female micro to hdmi male standard adapter, $4 part from dealextreme). Others have posted how they can use the lapdock as a self powered hdmi external monitor with their laptop (very cool usage btw considering it's size)
Droid Bionic:
easily docks to the Atrix version of the lapdock by simply rotating the hdmi/micro usb connectors 180degrees in their sockets since they're piped in with short cables.
Galaxy SIII / S3 (mine is the T999):
here's where it gets tricky.
As I've gathered about the 11pin micro usb port (on the S3 and shared by the Note 2):
the original 5 pin MHL standard was ditched in favor of the 11pin MHL type connection. this in theory would allow the use of hdmi output with simultaneous usb otg and charging capabilities.
reviewing this thread here: (showthread.php?t=1953061&page=2) one can see that an OTG cable was modded with a simple resistor to allow for charging - member triff (the OP) was able to get this going and noted the log he got when the cable was plugged in reported 'hdmi fail' which leans to failing to initiate an hdmi connection... later in the thread member MRBR7 alludes to having an hdd running to view while charging on the OTG cable - his post is a bit vague as to whether he did the mod on an OTG cable or an HDMI cable.... i'll have to follow up.
finally, the posts in this thread (first 12 pages are a quick read showthread.php?t=1741583&page=12) provide resistor values and some close ups of the boards for the 11 to 5 pin adapter as well as what I thought was a list of pins for the 5 pin MHL.
I'm really trying to be purposefully clear in this thread as to my findings because it seems there are too many vague threads out there regarding the functionality; simply missing a letter or punctuation in a thread can turn a sure thing into a vague post...
another avenue is the official samsung galaxy note 2 "smart dock" which has 3 usb ports, in additon to an hdmi output and charging input - since this is sold out in the US (and due to PAL vs NTSC Standard I am hesitant to order from germany) it'll be a while before I can personally buy and test one (unless i can find one locally somehow). this seems like the best bet for a dock which can be hacked or adapted to interface the s3 with the lapdock.
my ideal final outcome of this thread would be to have a small cable or interface box which i can plug into the s3 to enable hdmi output + usb otg + charging. that trifecta would connect via a single micro-usb to the device (11 pin) and have an output of a female usb (A or micro, either can be adapted) and either a male or female standard hdmi (again, both of which can be adapted). this cable could enable the phone to be used as an impromptu desktop, carputer, lapdock brain etc...

Lapdock software required...
Sent from my SGH-T999 using xda premium

deedscreen said:
Lapdock software required...
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What do you mean by that?
The Atrix Lapdock is internally nothing but an 1366x768 HDMI LCD monitor with (rather poor) speakers and an USB-Hub on which a keyboard/touchpad and two free USB-ports are connected to. The monitor and the USB-hub have to be simply attached to any device which supports HDMI-output and USB-OTG via (slightly uncommon) HDMI- and USB-OTG-plugs.
There is no software running on the Lapdock (it is actually completely dumb) and there is no need for any specific SW on the connected device (might be nice to have something like webtop running but it is not necessary).
The S3 works flawlessly with the keyboard/touchpad/USB-hub using a USB-OTG-Adapter and with the HDMI-monitor via an MHL/HDMI adapter cable. The tricky part is only to get both simultaneously and possibly even charge the S3 from the Lapdock. For that purpose I use as long as there is no combined MHL-HDMI/USB-OTG-adapter/dock available (as described in the thread and page already indicated above: showthread.php?t=1741583&page=12 ) the allshare cast dongle and a cheap OTG adapter. You can use office apps, watch videos, play games etc. without any problem. You can check out
ecx . images-amazon . com/images/I/712%2BAbT1u3L.png
(no links for me yet)
to see how that looks like...

a32quaeler said:
What do you mean by that?
The Atrix Lapdock is internally nothing but an 1366x768 HDMI LCD monitor with (rather poor) speakers and an USB-Hub on which a keyboard/touchpad and two free USB-ports are connected to. The monitor and the USB-hub have to be simply attached to any device which supports HDMI-output and USB-OTG via (slightly uncommon) HDMI- and USB-OTG-plugs.
There is no software running on the Lapdock (it is actually completely dumb) and there is no need for any specific SW on the connected device (might be nice to have something like webtop running but it is not necessary).
The S3 works flawlessly with the keyboard/touchpad/USB-hub using a USB-OTG-Adapter and with the HDMI-monitor via an MHL/HDMI adapter cable. The tricky part is only to get both simultaneously and possibly even charge the S3 from the Lapdock. For that purpose I use as long as there is no combined MHL-HDMI/USB-OTG-adapter/dock available (as described in the thread and page already indicated above: showthread.php?t=1741583&page=12 ) the allshare cast dongle and a cheap OTG adapter. You can use office apps, watch videos, play games etc. without any problem. You can check out
ecx . images-amazon . com/images/I/712%2BAbT1u3L.png
(no links for me yet)
to see how that looks like...
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Interesting..especially for the 89$ price tag. Long as one can deal with S3 not charging its a simple setup no ?

xManMythLegend said:
Interesting..especially for the 89$ price tag. Long as one can deal with S3 not charging its a simple setup no ?
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Well, I got the Lapdock for less than 70 Euros and I think that is really great value since it is very well build and versatile... the allshare cast dongle is a bit overpriced (currently it is about 55Euros here) for an adapter-replacement but if you need it for different use cases (I mainly have it for a small LED-beamer) it might be worth it.
You can charge the S3 from one of the USB-ports of the Lapdock using a micro-USB cable (as long as the dongle or any other device is connected to the Lapdocks HDMI-plug - that is what signals the Lapdock to power up), but you can not simultaneously use the MHL/USB-OTG then. So it is nice for watching movies from your S3 on the Lapdock-screen (btw. the sound works fine as well) while re-charging the S3 but for "office" work with kb/touchpad you have to replug the OTG-cable. Actually I'm quite impressed with the relatively low power consumption of the allshare cast connection - so that is not a real problem IMHO. There might be people out there to solder the right resistors into OTG-adapter cables to allow both...
One disadvantage is obviously that you have this "bulky" (it is actually lightweight but still bigger than a simple adapter) dongle on the Lapdock. The big advantage over a dock is that you can more or less freely move around the S3 while using this combination.

deedscreen said:
Lapdock software required...
Sent from my SGH-T999 using xda premium because i'm a moron and don't know what i'm talking about
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you obviously don't know anything about the lapdock, so please, hang around, do some searching and learn about what it is before posting vague comments that ruin the integrity of a factual thread.
xManMythLegend said:
Interesting..especially for the 89$ price tag. Long as one can deal with S3 not charging its a simple setup no ?
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google 'bens outlet' (a 1saleaday company) and you can pick one up for as little as $50usd! assuming it actually ships out, but worth it for a spare monitor project at the very least... - and yes, not a hard setup at all - the first use in my mind would be just to have a full size screen on the go, however to have a cable capable of mhl/hdmi + usb otg + charging would turn the dock into a powerhouse android laptop using 4g internet etc... (it'll give the chromebook a run for it's money)
a32quaeler said:
the allshare cast dongle is a bit overpriced (currently it is about 55Euros here) for an adapter-replacement but if you need it for different use cases (I mainly have it for a small LED-beamer) it might be worth it.
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what's this LED beamer? (i'm just intrigued)
a32quaeler said:
You can charge the S3 from one of the USB-ports of the Lapdock using a micro-USB cable (as long as the dongle or any other device is connected to the Lapdocks HDMI-plug - that is what signals the Lapdock to power up), but you can not simultaneously use the MHL/USB-OTG then. So it is nice for watching movies from your S3 on the Lapdock-screen (btw. the sound works fine as well) while re-charging the S3 but for "office" work with kb/touchpad you have to replug the OTG-cable. Actually I'm quite impressed with the relatively low power consumption of the allshare cast connection - so that is not a real problem IMHO. There might be people out there to solder the right resistors into OTG-adapter cables to allow both...
One disadvantage is obviously that you have this "bulky" (it is actually lightweight but still bigger than a simple adapter) dongle on the Lapdock. The big advantage over a dock is that you can more or less freely move around the S3 while using this combination.
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all very cool - I'm thinking of ordering the allshare dongle just to try this out until the smartdock gets back in stock to hack it apart .. I'll probably order an 11pin mhl in the meantime too. I have a 5pin mhl, not sure what I can do with it without the adapter (i'll probably bundle it with my galaxy nexus and sell it all)
@a32: on a side note, i broke down and bought a Note 2 yesterday haha, so I'll probably be continuing this project with the Note2, (tmo just happened to have some in stock haha) I'm putting my week old S3 up for sale soon, but this project is still on my radar!

teshgnex said:
you obviously don't know anything about the lapdock, so please, hang around, do some searching and learn about what it is before posting vague comments that...
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The S3 would need the lapdock .apk for certain functionality... calm down, I've owned enough Motorola Android devices to know what I'm saying...
Thats all... Ben's Outlet would be good plus All4Cellular sells it with the extenders...
Its out of stock now but you can get the extenders separately at a hefty price:
www.all4cellular.com/motorola-atrix-4g-laptop-dock-hdmi-upgrade-kit.html
The hefty priced cables are below, but it is worth the cost:
www.all4cellular.com/motorola-atrix-4g-upgrade-kit.html

deedscreen said:
The S3 would need the lapdock .apk for certain functionality... calm down, I've owned enough Motorola Android devices to know what I'm saying...
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Sorry to snap, but if you've been on enough forums, you begin to notice that comments like yours are just add to confusion when unsubstantiated.
Any phone without a 'web top' mode or apk would obviously not work similar to the webtop mode that Motorola intended, however it'll still work, perfectly in fact, because this connection project is akin to hooking up your phone to a tv or monitor and using a usb mouse and keyboard to control it, albeit it's portable, like the padphone.
If you have any ideas as to how one could hookup both mhl/hdmi and usb/otg with charging I'm all ears (the real breakthrough would easily be seeing a US version T999 or similar running with the Smart Dock for the Note 2
Another thought to throw out there is whether this finished product could look similar to the padphone concept: a pocket for the phone to slip into, docking connector inside, basically self contained
As for those extension cables posted, places like monoprice and dealextreme have much better prices and selection, granted I'm just going those links on my phone - i don't understand how those are considered 'adapters' when all they do is extend the port
Sent from my SGH-T889 using xda app-developers app

Silly question but why would you need software when your using it as a monitor, keyboard, mouse, usb hub & charging?

djashjones said:
Silly question but why would you need software when your using it as a monitor, keyboard, mouse, usb hub & charging?
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You don't.
... that's what we posted already. The webtop SW on some Motorola devices starts a specific desktop and window-manager on your phone when connecting to the lapdock. It may facilitate the use of the apps on the phone via the Lapdock (resolution/size/... of apps in windows etc.) but you do not need it to work with the S3 on the Lapdock.

awesome! im very tempted to get one but in the UK they are still expensive

teshgnex said:
what's this LED beamer? (i'm just intrigued)
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A bit off-topic: It is an ACER C20 I own for nearly 2 years now. Like this one:
ecx . images-amazon . com/images/I/41aXbNerVoL._SL500_.jpg
It is out of stock anyway, but I could "partly" recommend it:
It has the size of a phone, a built-in battery and - most important - lots of inputs (mini HDMI (HDCP), D-Sub (24-pin Universal), Composite Video/Audio (2.5mm 4-pin mini jack), micro USB (Typ AB), micro SD Card (SDHC)) + Audio out & speaker. It plays media from internal storage/SD card but that internal media-player is crap. It is however extremely mobile and together with movie players on modern phones like the S3+cast-dongle - or any tablet with HDMI-out or a device with Composite A/V out (e.g. old Nokias) - a nice device e.g. to entertain kids on travel or showing pictures while visiting the grandparents or alike. On the other hand, it is not really bright at all (actually you have to be in a very, very dark room to use larger screen areas) and the battery lasts often only 1/2 hour (but you can charge it with 5V from USBs or use it while on the mains adapter).
It works really nice with the S3 + allshare cast dongle (that's what I bought the dongle for in the first place), has a descent image quality (848x480 pixel) and accepts up to 1080i HD over HDMI as input signal for downscaling but for the dongle the input is of course limited 720p. It does NOT work with the S3 using the cheap (chinese) USB-MHL/HDMI-adapter with the long red cables (somewhere discussed here as well) since that one provides 1080p30Hz (at least to my TV - on which it works) and the projector obviously can't sync to that.
Back to the topic: that cheap HDMI-adapter for S3 works not very well with the Atrix Lapdock; you get an image but it is vertically squeezed. Again: the Lapdock and the S3 + cast dongle go together extremely well.

That led projector sounds pretty cool, I've waffle'd on buying one various times but can't say I've had a particular need other than for the fun of it hah
a32quaeler said:
Back to the topic: that cheap HDMI-adapter for S3 works not very well with the Atrix Lapdock; you get an image but it is vertically squeezed. Again: the Lapdock and the S3 + cast dongle go together extremely well.
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So I'm guessing you've tested this, but with the hdmi cable and the screen rotation turned on, the device still shows up in portrait? Unless I'm reading that wrong and you mean it's width wise video but looks like a 4:3 video on a 16:9 widescreen?
I wonder if that behavior is present with the official adapter...
So to return to the method of the allshare dongle, does it look like image 1 as i posted?
I recall you mentioned the dongle's hdmi signal is what triggers the docks micro usb port for kb/mouse control and charging, so for clarity i drew the wiring method up.
The next two wiring diagrams are what I'd expect to do as i finalize what the connection should/could look like...
I'm always in for feedback on streamlining the connections - the simple yet two part method will be just having the official smart dock, assuming it works with the s3, powered with one usb port, hdmi to hdmi mini and usb micro to the usb port, though maybe modify the output to delete charging power from the kb/m micro usb port...
Sent from my SGH-T889 using xda app-developers app

teshgnex said:
I recall you mentioned the dongle's hdmi signal is what triggers the docks micro usb port for kb/mouse control and charging, so for clarity i drew the wiring method up.
Click to expand...
Click to collapse
Sorry, don't have much time and will have a look at your drawings later... The presence(!) of a device connected to the HDMI is detected by checking for a "Ground"-connection of one of the HDMI-pins (from googling I remember it to be HDMI-DDC/CEC) - that's what powers up the Lapdock (and activates the USB-Ports). No need for an already powered device on that HDMI port. The problem is however that there are many HDMI adapters/extension cables out there which do not pass that specific wire/connection and then the Lapdock will not react when using those. There is however no need to buy these overexpensive Motorola cable sets (those prices are unbelievable!)... my adapters & cables cost in total about 9 Euros.
+5V on the OTG-USB cable from the peripheral device (=Lapdock) to the host is not "liked" by most hosts (the S3 did not really react on it but it is probably not a good idea anyhow) so I cut the 5V red wire of the micro-USB(female)-to-micro-USB(male)-cable. On the latter you need something to signal the S3 the OTG mode (pin 4 grounded to 5). I do that quite stupidly using additional USB->OTG-adapters but you would have to take care of that in your MHL/OTC combi adapter with resistors etc. anyhow.
The "chinese" Adapter is vertically squeezed. The S3 goes into the correct HDMI-out mode including the (stock) homescreen to be usable in landscape mode - that is not a problem. Probably the 1080p30Hz mode is not well understood by the Lapdock and/or the adapter does not correctly "negotiate" the right resolution-/display ratio with the display or the quality of the sync signal from the adapter is really bad. That chinese adapter is not too bad for Full-HD TV sets but unusable for anything else. I did not try the official one. The Lapdock works however well with the dongle.

This info is much appreciated. I took the dive and ordered a lapdock from bensoutlet.com for $50 to play with. The regular one is $60 - but the keyboard that adds Hebrew letters was $10 cheaper. I figure the lettering doesn't hurt anything so I'd rather save the $10.
If anybody figures out how to simplify the connections, or perhaps someday enable MHL out + USB host with this thing - please post back.
Right now - I spent an additional $6 on dealextreme.com to get a microHDMI (female) to HDMI male adapter, and a micro usb female to male adapter so I can try to use the keyboard.
The result is going to be pretty cluttered, but I figure $50 is cheap for a portable, self powered HDMI monitor that could also power stuff from it's ports.

teshgnex said:
The next two wiring diagrams are what I'd expect to do as i finalize what the connection should/could look like...
Click to expand...
Click to collapse
Your drawing No 1 is what I use (see below). No 2 is how it should be indeed (but where is the "modded cable" coming from?). While No 3 will not help you since only the presence of a shortened HDMI-CEC pin (+ opening the display a bit) will power ALL the USB-ports including U1+U2 (that activity mode of the Lapdock is indicated by a small white LED next to the touchpad) - so there is no "pre-power" available. But (again) anything that provides that ground contact on the HDMI-plug will do the trick... I actually have one 90degree HDMI-adapter (don't know how to call it in English), which does exactly that and shortens those pin(s) and simulates to the Lapdock the presence of a device (I assume that is NOT on purpose but it works with a second, identical adapter as well). Don't take me wrong you do not need that one if you conect a device (any) directly to the microHDMI-to-HDMI adapter but it is needed when you use HDMI extension cables (etc.) that do not pass all wires to the HDMI device.
I attached some pics how I wire that thing. Pic 1: the micro HDMI plug on the Lapdock is turned by me by 180deg just to make a bit more room for the microHDMI(fem)toHDMI(male)-adapter. You may directly attach the dongle to it (it is relatively stable and easy to carry around - pic 2). That's what one could call "entertainment mode" since you may want to watch videos etc. this way. But than you have not enough space for the microUSB-cable for kb/mouse. That is what I use the 90deg-adapter for. This adapter alone signals already the Lapdock to power up (no other HDMI-cable or adapter I own does this). Back to pic 1: The microUSB(fem)-to-microUSB(male)-cable has the red 5V wire cut. The microUSB-to-USB + USB-microUSB-OTG(!) adapter is there only to signal the OTG-host mode for the S3. The stuff on the right are things you may use on the free USB-port.
That strange device with the mobile speaker attached to its headphone jack has to be explained: it is a (5 Euro) "USB sound card". That is a bit odd... the Lapdock has stereo speakers which are working well (but not great) and the audio-output via HDMI(cast) to the Lapdock works perfectly (sound is ok and in sync when watching videos & you can control volume etc. from the S3 or the Lapdock keyboard) but the allshare cast SW on the S3 does not allow you to plug in a headphone or connect a bluetooth audio-device to the S3 for output of the video(!)-sound. You can use headphones for mp3-player music while using an HDMI display etc. but when you switch on a video you have to remove headphones otherwise the allshare connection stops. There might be two reasons 1: HDCP, 2: there is a small lag in video display from the wireless transfer protocol and the audio stream is equally lagged on purpose to be well in sync with the video stream. You may want to bypass that artificial restriction because the Lapdock has NO headphone jack ... and you can by using such a "soundcard" which is fully supported by the S3 but the sound is then indeed a bit "in advance" of the video stream.
Less exotic devices you can attach are external disks/pen drives or even game controllers (all of them work)... Pic 3 shows you how I wire it for "productivity mode"

P0ll0L0c0 said:
This info is much appreciated. I took the dive and ordered a lapdock from bensoutlet.com for $50 to play with.
Click to expand...
Click to collapse
Thank you. 50$ ! When they are as cheap go and get some (or better get many)! The Lapdock is really, really useful and works with many devices.
I originally bought it for the Raspberry Pi but I use it as well with an Archos A80G9 android tablet (not so often since the tablet is big enough anyhow) which has seperated (mini)HDMI and USB-OTG connectors (as it should have been done for all mobile devices including the S3) and used it for my "old" Nokia N8 (miniHDMI as well). In that case USB-OTG does not work since the N8 does not support USB hubs but you can chrge it and watch movies on the Lapdock display with it (in the train ...). The RasPi is powered via the same cable that is used for kb/mouse. In that cable I did obviously not cut the 5V wire. The power the Lapdock provides this way is sufficient to operate the RasPi (+ wifi dongle) ... about 1A is needed for that. So it should be possible to use that power via that OTG microUSB port for the S3 as well ...

What abot the EDD-S20E dock won´t that work with the lapdock ???
Problem is the dock is useless for my next device in 2 - 3 Years....
The allshare cast dongle might stay usefull even with the next gen of android phones....

[Q] Note II MHL > HDMI issues

Hi all.
I've searched for similar questions and can't find anything that gives me an answer... so here goes.
Model number: GT-N7100 (Samsung Galaxy Note 2)
Android version: 4.1.1
Modifications: None.
Problem:
- Connect MHL cable to phone.
- Connect power
- Connect HDMI to tv & MHL
- Phone pops up a message on screen advising that HDMI connection has been made.
- No output from phone to tv.
I tried originally with the wrong MHL cable designed for a Galaxy S2 (established this thanks to a post I found on here, thanks). Then replaced with one designed for the S3 which should (according to what i read) also work with the Note2.
Am I missing something here?
The cable used was from Amazon and is not a samsung original part. But before spending more money to get the samsung part i want to be sure i exhausted all options with the cheaper alternative.
Thanks in advance for any help anyone can give.

wisewood said:
Hi all.
I've searched for similar questions and can't find anything that gives me an answer... so here goes.
Model number: GT-N7100 (Samsung Galaxy Note 2)
Android version: 4.1.1
Modifications: None.
Problem:
- Connect MHL cable to phone.
- Connect power
- Connect HDMI to tv & MHL
- Phone pops up a message on screen advising that HDMI connection has been made.
- No output from phone to tv.
I tried originally with the wrong MHL cable designed for a Galaxy S2 (established this thanks to a post I found on here, thanks). Then replaced with one designed for the S3 which should (according to what i read) also work with the Note2.
Am I missing something here?
The cable used was from Amazon and is not a samsung original part. But before spending more money to get the samsung part i want to be sure i exhausted all options with the cheaper alternative.
Thanks in advance for any help anyone can give.
Click to expand...
Click to collapse
my theory is it has something to do with all share cast

I bought a 'generic' adapter at first, did not work. Ended up going with the Samsung adapter...worked fine...

make sure yr MHL cable/adaptor is compatible for note2/s3, they use different pins with older model

Hi all.
Thanks for the replies. [will do the whole thanks button thing in a minute].
I threw the adapter in a drawer for the weekend and pulled it back out this morning to have another crack at it.
Its the cheap n nasty adapter that is at fault. I shoved the connector into the bottom of the phone really hard this time, and instead of black, the tv screen went green. All green. A bit of jiggling later and i had phone output on the tv, but its a very sketchy connection and a slight knock loses the connection, even though the phone still thinks the cable is connected still.
Only problem then is that there is no audio coming through the tv. All phone settings suggest there should be.
So i went upstairs to try on another tv, and it works perfectly with video and audio (once the cable is rammed home good and hard).
Problem solved. For now, it will do. But I will at some point be investing in the genuine samsung part that should do the job properly. And a new TV for the living room ~ current one is old and was a budget model at the time, so you can imagine how bad it is by todays standards.

Hi, can you help to check if the camera apps work when you use mhl ?

Im using the sprint gn2 do I go with the same step when connecting mhl adapter? Before you connect to television is the phone suppose to be charging? I think I have to buy the right one .I bought mine amazon from china and still have not hooked it up to my tv yet. Can there be a problem with phone? Its new never dropped
Sent from my SPH-L900 using Tapatalk 2

i just got my samsung MHL adapter which is for the S3 but supposedly should work with note 2 also.
when i connect the hdmi cable and the power cable and then connect it to my phone i see a popup "hdmi cable cvonnected"
however,
my monitor (Dell 2408WFP) just goes into sleep mode.
i also tried another monitor.. same thing.
i'm on android revolution with perseus kernel... which is just a modded stockrom.
i have not made a samsung account so i don't have any of the samung specific apps activated... could this be the problem?
do you need to have that sharecast or whatever to be activated first in order to get the TV out functionality?

I bought Samsung MHL adapter last month for HTC One X and it works fine even without connect the phone to charging.
I just tried that to my new Note 2 and it doesn't work at all.. already try to charge the phone still not showing anything not even a notification saying my note2 connected to the hdmi...
Sent from my GT-N7100 using xda premium

Is it true with the note by sprint ...it has to be sprint o/s to work and can't have a rom on phone
Sent from my SPH-L900 using Tapatalk 2

Having the exact same issje with the original s3 adapter. It worked fine 2 days ago and then one day from another it magically stopped working on my note 2. Still works with other devices..

ok.. i decided to actually create a samsung account and installing the all-share cast app hoping this would finally make the mhl work..
but alas..
same thing..
i connect power, mhl en and hdmi cable.... set monitor to look for hdmi signal...
phone then gives me the 'hdmi adapter connected' message and then the monitor goes into energy saving mode...
i guess my adapter is faulty.... it is supposedly a genuine brand new samsung adapter but i got it from ebay hongkong or china or whatever... so... well... you know..
i think i will order the wireless all-share hub in stead...

Are you rooted? I've read that hml doesn't work if you are.
Edit: I should have read the rest of the thread. Looks like you solved the problem.
Sent from my Galaxy Note 2 using Tapatalk 2

EP2008 said:
Are you rooted? I've read that hml doesn't work if you are.
Edit: I should have read the rest of the thread. Looks like you solved the problem.
Sent from my Galaxy Note 2 using Tapatalk 2
Click to expand...
Click to collapse
well yeah... if getting a wireless allshare cast hub instead for 80 bucks is a solution.. then yes.. i guess it's solved..
by the way,
yes.. i have root.. where did you read that a rooted phone prevents the MHL adapter from properly working?
do you have a link or something?
in that case i could still try to persuade the Android Revolution HD Rom developer to look into the issue...

PainOdZ said:
Having the exact same issje with the original s3 adapter. It worked fine 2 days ago and then one day from another it magically stopped working on my note 2. Still works with other devices..
Click to expand...
Click to collapse
Same problem. Same same... Rly.
How can I fix? I've a rooted device.

psyopussy said:
ok.. i decided to actually create a samsung account and installing the all-share cast app hoping this would finally make the mhl work..
but alas..
same thing..
i connect power, mhl en and hdmi cable.... set monitor to look for hdmi signal...
phone then gives me the 'hdmi adapter connected' message and then the monitor goes into energy saving mode...
i guess my adapter is faulty.... it is supposedly a genuine brand new samsung adapter but i got it from ebay hongkong or china or whatever... so... well... you know..
i think i will order the wireless all-share hub in stead...
Click to expand...
Click to collapse
Try it using the 5V - 2A charger, i have read, somewhere i forgot, that 2A is a must for being able to use MHL.
I can't say if it is true or not, i'm atill waiting all stuff be delivered (All-share cast hub, MHL adapter, Smart Dock, etc).
Good luck

It seems like the china products r all faulty
Sent from my SPH-L900 using Tapatalk 2

pirata****zu said:
Try it using the 5V - 2A charger, i have read, somewhere i forgot, that 2A is a must for being able to use MHL.
I can't say if it is true or not, i'm atill waiting all stuff be delivered (All-share cast hub, MHL adapter, Smart Dock, etc).
Good luck
Click to expand...
Click to collapse
For me the MHL cable worked well with easy disconnections (any minimal movement). But I used it with the bloutooh mouse and so I didn't feel so much the issue.
Now the note 2 doesn't reveal the cable. I plug it in and nothing happens.
I don't remember if I changed ROM before the issue but it's sure I always had a custom ROM.
Can be a ROM problem?
I will try the MHL cable with my father's s3 and let you know if is a cable issue.
EDIT:
SORRY GUYS, IS A CAVE PROBLEM. ITS DEAD

I have rooted my device also. Come to think of it, this might just be the issue. Rooted with exynosabuse gonna try to unroot and see if it works. Still want it to work with root though because i use the sixaxis to play games..

Once u unrrot your note 2 did it work with the mhl cable
Sent from my SPH-L900 using Tapatalk 2

diy smart dock for galaxy s3

after searching a little bit about 11 pin port in galaxy s3 and take apart an 11pin to 5 pin adapter i am thinking about make DIY smart dock for galaxy s3
i ordered mhl adapter and waiting for it mean while i tried to connect usb otg and extra micro usb connector together so i can use otg and charge the phone at the same time. but the problem is when i short ground and seance pin for otg ; charging doesn't work.
so any suggestion about the project?
i attached a plan of my project here
edited:after failing my 1st attempt i succeeded to make it work on my 2nd try!
this time i opened a 11 pin to 5 pin adapter. it has a small resistor which is connected ground to sense pin for hdmi out put. i removed that resistor and i connected 5 extra wire in the adapter 1. vcc 2. data+ 3. data - 4. sense 5. ground ( i showed in picture) . then i connected sense and ground with a 40.2k resistor.
then the 4 wire, which i i connected in 11 to 5 pin adapter (vcc, data+,data-, and ground) , goes to a femele usb where you will connect usb devices or usb hub.
and thats it!! hope you can try it too. if if have any other question just ask me
http://www.youtube.com/watch?v=EFzX6NlKJBU&feature=youtu.be
if anyone want to donate to help me with more projects click the link below
https://www.paypal.com/cgi-bin/webs...&bn=PP-BuyNowBF:btn_buynowCC_LG.gif:NonHosted

AW: diy smardock for galaxy s3
You forgot the vcc at the otg side, but anyway it can't work.
While charging you send 5v through the micro usb to the phone.
But in otg mode the phone will send 5v to the usb connector to supply power for the connected device.
I think your only chance is to use the inductive connectors to charge your phone while in otg mode.
Sent from my GT-P5110 using xda premium

i uploaded the corrected one
and i found this
http://forum.xda-developers.com/showthread.php?t=1953061
but my knowledge about this stuff is little low. so need some explanation
thanks

AW: diy smart dock for galaxy s3
There seems no way like you want it. I told you the problem.
You have to use the Pins for the wireless charger (QI-charger) under the battery cover.
Sent from my GT-P5110 using xda premium

G4Cab said:
There seems no way like you want it. I told you the problem.
You have to use the Pins for the wireless charger (QI-charger) under the battery cover.
Sent from my GT-P5110 using xda premium
Click to expand...
Click to collapse
charging via the back pins while in OTG mode with throw a message popup that says over current protection and shuts down the S3
at least it does on mine.
I have the smart dock and after opening, it does contain quite a bit of electronics

NuclearEMP said:
charging via the back pins while in OTG mode with throw a message popup that says over current protection and shuts down the S3
at least it does on mine.
I have the smart dock and after opening, it does contain quite a bit of electronics
Click to expand...
Click to collapse
would you mind taking a few pictures of the smartdock guts so the rest of us tech savvy people can drool at its wonders?

here is a few of the Note 2 Smart Dock internals

NuclearEMP said:
here is a few of the Note 2 Smart Dock internals
Click to expand...
Click to collapse
you frelling rock!
---------- Post added at 12:28 PM ---------- Previous post was at 11:59 AM ----------
I have a suspicion that the IC to the left of the Realtek one is the brains of the board. The RT chip does the hdmi out conversion and the other two longer IC's are usb host and usb audio. Can't make out the printed data on the unknown chip, but my best bet is if we can get a dump of whats on there then we might have a good chance of DIY hdmi/otg capabilities. i'm no expert by far, but just throwing ideas out there.

wolfy02 said:
you frelling rock!
---------- Post added at 12:28 PM ---------- Previous post was at 11:59 AM ----------
I have a suspicion that the IC to the left of the Realtek one is the brains of the board. The RT chip does the hdmi out conversion and the other two longer IC's are usb host and usb audio. Can't make out the printed data on the unknown chip, but my best bet is if we can get a dump of whats on there then we might have a good chance of DIY hdmi/otg capabilities. i'm no expert by far, but just throwing ideas out there.
Click to expand...
Click to collapse
Heres whats inside, including the "other chip"
SiI9292 MHL-to-HDMI Bridge
The SiI9292 is integral to the design of low-power, MHL-to-HDMI accessory devices such as docking stations, converters and adapters, enabling HD video and audio connectivity between MHL-ready mobile devices and HDTVs with HDMI inputs.
-------------------------
Realtek RTD2120
Overview
This chip is the micro-processor of LCD monitor. It uses the design ware DW8051 of Synopsys as the 8051 core of this chip and is compatible with other industry 8051 series. Also, 96Kbyte FLASH with 8 bit bus is embedded in this chip which is licensed from TSMC 0.18um e-FLASH process. Here we use the package of PLCC44/LQFP48 if we would like to have a discrete MCU controller or we make a multi-chip package with our LCD monitor controller to form one chip package to save the cost of package and PCB material.
Features
? Operating voltage range : 3.0V to 3.6V
? 8051 core, CPU operating frequency up to 50MHz
? 4 clocks per machine cycle
? 256-byte internal RAM
? 512-byte external data RAM, including 256-byte DDC RAM(128-byte x 2) and 256-byte general purpose RAM
? 96K-byte flash memory, 64k for program and 32k for saving parameter
? Two DDC ports compliant with VESA DDC1/2B/2Bi/CI
? Three channels of PWM DAC with programable frequency from 100K to 100Hz
? Watchdog timer with programmable interval
? Three 16-bit counters/timers (T0, T1, and T2)
? One PLL to provide programmable operating frequency and clock output, 2 clock output ports
? One full-duplex serial port
? Six interrupt sources with 2 external interrupts
? Four channels of 6-bit ADC
? Hardware In System Programming(ISP) capability, no boot code required
? Built-in Low voltage reset circuit
? Embedded 1.8V regulator
? Code protection
? Available in 44-pin PLCC or 48-pin LQFP package
----------------------------
FE1.1S
USB 2.0 HIGH SPEED 4-PORT HUB CONTROLLER
--------------------------------------------------
The PCM2704/5/6/7 is TI's single-chip USB stereo audio DAC with USB-compliant full-speed protocol controller and S/PDIF.
-------------------------------------

otg + charging success
hi guys! just want to give an update of my work.
i got otg and charging work together.
as in this post http://forum.xda-developers.com/showthread.php?t=1953061 i just connect ground and sense pin with a 40.2 k ohm resistor.
i ordered 40.2 k ohm resistor which i just got tonight. the hdmi adapter i have is a cheap and old one. its not mirroring the screen. i ordered a new Rocketfish MHL HDTV Adapter . hope that will work!! waiting for that to arrive!!!!
here i am giving 2 screen shot

mess lol
and here what i did so far....
i didnt connect micro usb female port for data sync because those i didnt get yet.
if anyone have any suggestion please tell me.
hoping to make it work.....

necomer said:
and here what i did so far....
i didnt connect micro usb female port for data sync because those i didnt get yet.
if anyone have any suggestion please tell me.
hoping to make it work.....
Click to expand...
Click to collapse
Great work, necomer. I've also been trying that for two months now, but haven't been able to make it work. I have the 40,2 KOhm resistor between sense and GND, and am able to launch smart dock mode on some ROMs I have tried. So, which ROM are you running? My only idea here is that maybe you having a US S3 is what does the difference (well, I'm assuming that, maybe you have an international one).
Thanks in advance, and once again, great work :good:

Hi. Thanks for reviewing I am using us galaxy s3 and just the stock touch wiz rom android 4.1.1.
And I received my mhl adapter. But when I am connecting it the tv screen going all black. Any suggestion about that?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

necomer said:
Hi. Thanks for reviewing I am using us galaxy s3 and just the stock touch wiz rom android 4.1.1.
And I received my mhl adapter. But when I am connecting it the tv screen going all black. Any suggestion about that?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
I'm pretty sure your buying the wrong MHL adapter. The Note II and the s3 have a different micro usb than any other phone and require the samsung
MHL adapter.

Not sure what you are trying to do?
Amazon sells a combo cable so you can use OTG and charge the device at the same time. I use it to connect a 1TB portable drive to my S3 and Tab 2 10.1.
I bought the official Samsung HDMI adapters for both devices. They are powered and stream over HDMI to my TV just fine. Works with just about everything I've tried although some services require some workarounds. Copy protection crap.
What you are trying to do sounds risky. You might fry the phone.
I apologize if I haven't grasped your intentions but I'm kind of slow.
Edit: I think I may get it now. Are you trying to power, feed external data through OTG and then stream out to an HDMI display?
Dumb question as I said I'm slow but, how about the official Samsung HDMI adapter and use the power in port with a powered OTG combo cable?
This one:
http://www.amazon.com/gp/product/B003WV5DMO/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1

Logunn said:
I'm pretty sure your buying the wrong MHL adapter. The Note II and the s3 have a different micro usb than any other phone and require the samsung
MHL adapter.
Click to expand...
Click to collapse
i used a 11 pin to 5 pin convertor. but i guess i did something wrong while connecting the wires .
i will order new 11 pin to 5 pin adapter bcz i messed up this one

schneid said:
Not sure what you are trying to do?
Amazon sells a combo cable so you can use OTG and charge the device at the same time. I use it to connect a 1TB portable drive to my S3 and Tab 2 10.1.
I bought the official Samsung HDMI adapters for both devices. They are powered and stream over HDMI to my TV just fine. Works with just about everything I've tried although some services require some workarounds. Copy protection crap.
What you are trying to do sounds risky. You might fry the phone.
I apologize if I haven't grasped your intentions but I'm kind of slow.
Edit: I think I may get it now. Are you trying to power, feed external data through OTG and then stream out to an HDMI display?
Dumb question as I said I'm slow but, how about the official Samsung HDMI adapter and use the power in port with a powered OTG combo cable?
This one:
http://www.amazon.com/gp/product/B003WV5DMO/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1
Click to expand...
Click to collapse
what i am trying to do is, use otg , charge the phone and use hdmi at the same time. i thought it would be easy bcz samsung made new 11 pin connector in Galaxy s3 . so apparently its supposed to work ,as they are not using same pin for transferring data. But i dont have any idea about internal proses. while charging and otg at the same time is possible, dont you think we can connect hdmi with it in any way?
well all this is just guessing from my little knowledge. i want some suggestion from those who worked on this and correct my mistakes

necomer said:
Hi. Thanks for reviewing I am using us galaxy s3 and just the stock touch wiz rom android 4.1.1.
And I received my mhl adapter. But when I am connecting it the tv screen going all black. Any suggestion about that?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
Maybe... it's a HDCP problem...
If your TV don't support HDCP function(or authentication failed), then MHL chipset will show a black screen
(HDCP : High-definition Digital Content Protection)

I was going to this topic, being all hopeful that I finally might get my S3 in OTG+Charge mode. And then it turned out it only worked on a phone still running 4.1.1. I have 4.1.2, and OTG+charge did work for me before, but it seems Samsung broke it in 4.1.2. It is probably the fault of the kernel that came with the XXELLC (a stock 4.1.2 ROM) update, but how to fix it is beyond me.

Are you serious! I won't update mine then. I need to use that together! !!
Thanks for the information
Sent from my SAMSUNG-SGH-I747 using xda app-developers app