Develop Bugs

Tab is going into MTP mode and wont charge.....

This is hooked up to the Samsung charger , I have-no idea what the heck is going on..... anyone else?
Sent from my GT-P7510 using xda premium

pdxrealtor said:
This is hooked up to the Samsung charger , I have-no idea what the heck is going on..... anyone else?
Sent from my GT-P7510 using xda premium
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if you turn off the tab and then plug it in, does the battery screen come on and does the device charge?

pdxrealtor said:
This is hooked up to the Samsung charger , I have-no idea what the heck is going on..... anyone else?
Sent from my GT-P7510 using xda premium
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My guess - faulty resistors in the charger or one of the wires in the cable is dead.
The Tab expects to see USB D+ and D- shorted together and floating at 1.2 volts, set by a resistor divider in the charger.
Does the cable work fine for USB data transfer?

I think the user has possibly used the wrong wording. If he's seeing the MTP mode come on that means that he's just got it plugged into a USB port on a machine whilst the tablet is on (whilst using the "charger" cable).
Simple answer if that's the case. The tab doesn't charge that way as there isn't enough power coming through the port to keep the tab on and charge. If you however switch off the tab, you should find it charges from the USB port
If not, let us know.

Actually the tab is going into MTP mode while plugged into the outlet, using the supplied Samsung power adapter and supplied 30 pin cable.
I think i need to call Samsung for replacement... although after really thinking about what I just typed I think might be simpler to just buy a new cable online.
Or is it the actual power adapter that's faulty....

Well that is quite odd then. Does the tab charge if you switch it off and then plug it into the outlet / pc?

Chiribo said:
I think the user has possibly used the wrong wording. If he's seeing the MTP mode come on that means that he's just got it plugged into a USB port on a machine whilst the tablet is on (whilst using the "charger" cable).
Simple answer if that's the case. The tab doesn't charge that way as there isn't enough power coming through the port to keep the tab on and charge. If you however switch off the tab, you should find it charges from the USB port
If not, let us know.
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No, his wording was explicit enough to indicate that the tab is falsely detecting the factory charger as a USB host. This will happen with iPad/iPod/iPhone chargers, and would happen with the factory charger if the cable were faulty (D+ or D- open) or if the charger were faulty.
Again, to the OP: Does the cable work for syncing to a PC to transfer data? If it doesn't work at all, that's a sign that D+ or D- of the cable is open.

Meh, some people use words such as charger and cable interchangeably in terms of their truer intended meanings at times.
I was simply trying to cover that base.

Not sure if the cable works for data ....as I do everything over the air. The cable was giving me troubles at the tab end, (loose connection) but lately has been working OK.
I also haven't been charging and using at the same time lately either. I really needto contact Samsung and talk to them about a warranty replacement, but I have a feeling I'd be better off just buying a new one off Amazon or the like....
Sent from my GT-P7510 using xda premium

Wrong section n00b!!!!

akarol said:
Wrong section n00b!!!!
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Thanks for that...
Sent from my Nexus S using XDA Premium App

pdxrealtor said:
This is hooked up to the Samsung charger , I have-no idea what the heck is going on..... anyone else?
Sent from my GT-P7510 using xda premium
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I have the same issue. Check that with different cables. So cable and charger is not the reason

If you're running a ROM with Pershoot's kernel, you can "Enable Charge From ANY USB" (see link in my signature). If you're running something else, you can make yourself a "DIY Universal Charging Inline Cable" that will trick the Tab into charging off anything (again, see the link in my signature).
But before you go out spending money (even if it's just a little bit of $$$) you should see if the cable works for data transfer between your computer and the tab.
If the cable works, then the "DIY Universal Charging Inline Cable" will keep you going until Samsung sends you a replacement charger.

I had this problem and didn't know what was wrong for a while. It turned out the the charger wasn't plugged in all the way in the outlet. I guess it wasn't getting all the juice it needed.

Am suddenly getting this problem tonight also it sometimes turns my tablet off but won't let me turn it on till I pull the charger out.I've also noticed that if I plug it in when the tab is off the battery sometimes comes up saying it's charging
just plugged the usb lead in to 2 laptops and they both show a usb error

I started having the same problem 2 days ago. All of a sudden i plugged in the wall charger and it went into MTP mode. It will charge if turned off but I've noticed it takes a much longer time to charge. From 3% it took almost 24 hrs to completly charge. Thinking that I'll have to buy a new wall charger.

Please help
Another one about charging...
My 10.1 P7510 takes tooooo long to charge, even beeing off. If I connect it to my notebook data transfer is correct but battery keeps draining, or at least not charging. If I turn it off (either connected to PC or charger) the charging icon appears correctly. I must say that cable (and charger) are not the original ones
Is it a problem of the Tab, or cable, and/or charger ?

I think the charger did not have enough current to charge the tab while still using it. The stock charger should be rated at 5V 2A. I tried another charger with only 1A and it still worked. Anything lower than 1A will end up showing that MTP mode.
Sent from my GT-I9100 using XDA App

I've got the same problem myself except I had to clean the charger clean of marinade sauce (it's a long story, don't ask!) and I took the device back to my local Vodafone store (I got it on a Mobile Broadband contract) as I thought it was faulty. They claimed the device was working fine although they used their own cable and not mine. They also claimed that if it was the cable, I should be easily able to buy one.
I tried buying one in every store I could think of, including the phone repair shops and they didn't sell them at all!
It's just a shame that a tablet like this which could have been a great tablet is crippled not only with no MicroSD slot, but also using a crappy proprietary socket whereas all the other Tabs have a MicroSD slot/uses a Micro USB port.
(I've already ordered a replacement cable from Amazon UK in any case for a reasonable price)

mtp-connected and media scanner running
I bought. My Tab 8.9 last November, only started having this problem since last night. There is red cross and mtp-connected,also,"media scanner running". I am using original cable and adapter that come with the Tab. Has anyone here found a solution?

Charging via USB on computer

My device charges very slowly if the display is off. If the display is on it does not charge at all.
I've installed the Samsung drivers from the website. Is anyone else able to charge their device via USB? I need to know if I should exchange mine.
Sent from my SGH-T989 using XDA App

I was able to charge my sgs2 yesterday at work through the usb port. It might be the phone, or maybe the usb port you are trying to use doesn't have enough juice to charge the phone? have you tried another usb port on the computer?

usb will always charge really slow compared to an wall outlet

Yes I have tried multiple ports, computers, and cables. Oh well, I guess I'll live with it.
Sent from my SGH-T989 using XDA App

+1
dimitrie said:
usb will always charge really slow compared to an wall outlet
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what he said
if you want fast charging, do it from a wall outlet

jasontx said:
My device charges very slowly if the display is off. If the display is on it does not charge at all.
I've installed the Samsung drivers from the website. Is anyone else able to charge their device via USB? I need to know if I should exchange mine.
Sent from my SGH-T989 using XDA App
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USB supplies max 500mA. Is probably half what the wall charger is giving you. Nexus S is only 750. My guess gsII is 1000 (1A). iPad charger is 2A.
Edit: no a higher power one than the stock charger won't charge the phone faster in a noticeable way. Charging circuits in remotely modern phones limit current to that safe max. If they don't you're probably risking damaging your phone.
Sent from my Nexus S using Tapatalk

I understand that the USB on the computer is weaker. I was surprised to see that when the phone was connected to the computer, screen on, and streaming music that my battery was actually reducing slowly. I would expect the opposite and this behavior seems abnormal.
Sent from my SGH-T989 using XDA App

that's exactly the reason why in car i use the 2A charger (2000 mAh), and in house i use 1000 mAh wall charger
if i leave it at the computer USB charging, i've to keep it iddle for it to charge after like... 4+ hours
that's usually what i do at the work place, so i keep the battery topped up, for when i need to jump back in the road
as long as you have WiFi on, or 3G/4G on, or if the CPU is in high activity, you'll never see the charge ever reaching the battery.
i always keep a spare wall charger at the office as well for times when i need a quick charge

Thanks for the input everyone! I'm glad it's not defective cause I love this phone!
Sent from my SGH-T989 using XDA App

My issue is a little different but decided against another thread. My phone will not charge with any other cable. Has to be pluged in to oem cable. I left it all night on my old phones charger and woke up with it almost dead. Plugged into oem it just charges super slow. Should i take it back?
Sent from my SGH-T989 using Tapatalk

Does the other micro USB cable work with other devices? If not, might be a defective cable.
On a side note, who prefers to charge via 500mah vs 1A? I have been charging my phone since day one using my printer, as well as my old Iphone. My battery performance is great! +24 hours on a single charge with moderate browsing 50/50 wifi and 4g. I typically enable the "power save" feature with minimal brightness and 15 sec screen timeout.

I worked on other devices
Sent from my SGH-T989 using Tapatalk

[Q] Charging problem
I have an issue that has popped up today. When charging through PC, the phone (not battery) is getting pretty hot and losing charge. I'm not sure what could be causing it. I stopped all extra processes and turned off the screen. This is not occurring when the phone is off.

[Q] What is probably the cause of slow charging?

I was curious that my phone sometimes used more than 5-7 hours to make the battery fully charged. It occurs on both Adam and Perseus kernel, and on both pre-rooted and Wanam rom.
And of course, I charge my phone with the plug, not USB port.
Sent from my GT-N7100 using xda premium

I have the same issues once in a while. Try to download GCC (Galaxy Charging Current) from Play Store and check on your average current while charging. Then from there, you can see where the problem occur.

The charger input on the phone is the cause
bankgg said:
I was curious that my phone sometimes used more than 5-7 hours to make the battery fully charged. It occurs on both Adam and Perseus kernel, and on both pre-rooted and Wanam rom.
And of course, I charge my phone with the plug, not USB port.
Sent from my GT-N7100 using xda premium
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I knew something was wrong when it took my phone 6 hours to charge from 22% to fully charged on the stock kernel, so I had my carrier swap my data cable. Swapping the data cable didn't fix the random slow charging issue. If you view the battery stats under settings, your phone will indicate what kind of source it's getting its charge from. I discovered sometimes when you plug your phone in via the stock travel AC adapter, your phone detects it as a USB port. It's not the charger that is the problem, but how Sammy designed the charger port or an error during the assembly process. I found a work around to avoid the phone thinking it's being plugged into a USB port. Once I initially lineup the data cable with the charger port, very very gently push down on the data cable as you fully insert it into the charger port. If you don't do so, it's usually a hit or miss when it comes down to what the phone will detect between AC and USB mode. This is the first phone that I own that seems to have this issue. Every since I've figured out what's been happening, I've been able without fail to avoid the slow charging issue.
Since discovering the quick fix to the slow charging with the Samsung data cable, I've discovered that my old HTC data cable works flawlessly without having to make any adjustments as I insert the cable into the charger port.

I tried using this app and it told me as the picture below.
What does it mean? Is it normal or abnormal?
Sent from my GT-N7100 using xda premium

What mode is your phone indicating that it's connected to. This can be viewed in the battery stats screen.
Sent from my SCH-I605 using Tapatalk 2

Charging slow???

Out of the blue I noticed my S3 was charging very slowly, it even was losing a charge while it was plugged in while I was using it. I figure it had something to do with my custom ROM so I reflash, still same outcome. The battery was still holding a good charge, so I figured it was something else. I then went out and bought a new charger, which came with a micro usb cord to see if that helped. Plugged in the new charger while using my old micro usb cord, still same outcome. Then used the new micro usb cord and old charger, charging went back to normal, problem solved! I would of never thought that the cord would malfunction from day to day use after such a short lifespan. Moral of the story, check your cords if you experience the same problem, it could save you some time and money!

Cables do go bad. Also, check for gunk in either end of the cable or even the phone's socket. I've seen all kinds of odd problems caused by lint and gunk in cables or plugs.

Same problem here waiting for my new cables to come to see if that's it
Sent from my SPH-L710 using xda app-developers app

Hopefully it's the cord and not the charge port.
Sent from my SGH-T999 using xda app-developers app

That is why I have a couple cords always laying around. I've found that simple things as unplugging it to fast and it gets pulled wrong. Go figure.
Sent from my Freeza MD4 Stock Rooted Galaxy S3

Proper Charging Cord crucial
MiG8GT said:
Out of the blue I noticed my S3 was charging very slowly, it even was losing a charge while it was plugged in while I was using it. I figure it had something to do with my custom ROM so I reflash, still same outcome. The battery was still holding a good charge, so I figured it was something else. I then went out and bought a new charger, which came with a micro usb cord to see if that helped. Plugged in the new charger while using my old micro usb cord, still same outcome. Then used the new micro usb cord and old charger, charging went back to normal, problem solved! I would of never thought that the cord would malfunction from day to day use after such a short lifespan. Moral of the story, check your cords if you experience the same problem, it could save you some time and money!
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True story; My wife has an S3. Over the Memorial Day weekend my wife had charged her phone with a EVO charger overnight. Next morning as we were leaving for the beach her phone was DEAD. I TOLD HER TO PUT IT ON THE CAR CHARGER, NOTHING. I asked if the phone was plugged in anyway long story short phone would not charge until I took the battery out and used the factory charger two hours all was well. Careful what you use to charge your handset.:angel:

I was having this problem, but the battery is over a year old and I live in a hot part of the world. Swapped the battery for a new one and everythings back to new. Fast chargimg and 9 hours of use. So glad I didn't go ti an HTC with a sealed battery compartment.
Sent from my SPH-L710 using Tapatalk 2

I would replace the battery and charger.

I've got the same problem. But my phone sits in a hot work truck most of the day. I suspect the battery is worn out now. I've tried new cables.

You could always try a new oem battery, they're pretty cheap on eBay. Make sure you get an oem though and stay away from the cheap knock offs.
Sent from my SGH-T999 using xda app-developers app

Battery

My battery been charging really slow lately. My phone has never been dropped or has no water damage. Can someone give me an idea and if so will a factory reset help out?
iTz Amazed On Note2

I had A similar issue and it ended up being the USB cable that came with the phone. I switched to another one and it charges so much faster.
Sent from my SPH-L900 using xda app-developers app

You can buy another battery... maybe the battery is the culprit happened to me... But i ended up buying an extended slim battery thats the same size as the stock one... It added to my battery life about an extra 4hrs... You can get it here http://www.ebay.com/itm/New-3960mAh..._Cell_Phone_PDA_Batteries&hash=item337ee79e91 well worth the money

Me too
I just started having the same problem. I use to be able to use my phone while it charges and it would charge fairly quick as long as I wasn't heavly using it. Now even when I'm not doing anything on it, its charging ridiculously slow.
I thought it had something to do with my recent flashing of 4.3 but I flashed a MC2 restore and it didn't seem to matter.

Get the Galaxy Charging Current app. It will let you know the charging current. It should be *Now: 1698*. Mine would read 466 and I would reinsert cable(until I got a new charger/cable) until it read 1698. It appears there is a problem with OEM cable.
https://play.google.com/store/apps/details?id=com.abmantis.galaxychargingcurrent.free

Wiley_11 said:
Get the Galaxy Charging Current app. It will let you know the charging current. It should be *Now: 1698*. Mine would read 466 and I would reinsert cable(until I got a new charger/cable) until it read 1698. It appears there is a problem with OEM cable.
https://play.google.com/store/apps/details?id=com.abmantis.galaxychargingcurrent.free
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The app's developer states that this app doesn't work on any Sprint devices. But it works on yours?

DJMaj07 said:
The app's developer states that this app doesn't work on any Sprint devices. But it works on yours?
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Been working great for ~3 months on my Sprint Note II. It said that when I downloaded the app too. Try the free version, I like it and bought the app for the dark background feature.

I would try another USB cable first. I was having the same issue. I tried a different cable I have around, and was charging like I was expecting. So, I order two premium USB cables from monoprice.
From the reading on XDA around here, it looks like the USB cable that came with phone get shorts in them fair easy; ie they're not very durable. For me, no biggie since I like to keep cables in various places--car, house, backpack, go to bag, etc.
It changing the cable didn't work, try a different charger. If that doesn't work, try the battery. If none of those work, then it's probably your USB port.
Although, the USB cable is most likely the issue.

If you've had the phone for awhile, try cleaning out the microUSB port on it. I used a toothpick and picked out a surprising amount of lint that had accumulated in there. It may help establish a better connection between the cable and the port.

Definitely seems to be an issue with the usb cable, I had the same issue, switched cable, and all is fine.
Sent from my SPH-L900 using Tapatalk 4

Thank you all for the info I will check up.on the extended slim battery. I feel that it might be my cable cause on the car charger it charges quick with no problem.
Sent from my SPH-L900 using Tapatalk 4

Mines is at 1100 when I down loaded that app.
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