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Hello all,
I have a nexus 7 2013 and I am looking for a kernel that supports otg plus charge. Now, I know elemental x (by flar2) and a few others have this but the ones I have found do not support hot swap, or unplug and replug without rebooting. I am pretty sure Timurs kernel supports this but he wants $36 to buy it and I would rather not spend the money without trying it out first. Specifically, I have a fixed in-car installation and a febon100 UVC video grabber to display a backup camera. When the car shuts off, the febon will be disconnected from the usb side of the nexus, and the only way to reconnect it is to reboot the tablet with power connected. Anyone have any ideas? Thanks for the help.
Ok so I figured part of it out. After the device looses and regains power, these two commands simulate the usb disconnect and reconnect and seems to work (only tried it a couple times)...
Code:
echo "2-0:1.0" > /sys/bus/usb/drivers/hub/unbind
echo "2-0:1.0" > /sys/bus/usb/drivers/hub/bind
However, I have another issue. I am using the elementalx kernel on android 4.4.4 (currently on Carbon rom but have tried stock and other roms as well with same outcome). When the tablet reboots with the otg cable connected, it does not charge when it first starts up. To charge it, I have to physically unplug and replug the cord in the nexus. Any ideas?
bigc9731 said:
Ok so I figured part of it out. After the device looses and regains power, these two commands simulate the usb disconnect and reconnect and seems to work (only tried it a couple times)...
Code:
echo "2-0:1.0" > /sys/bus/usb/drivers/hub/unbind
echo "2-0:1.0" > /sys/bus/usb/drivers/hub/bind
However, I have another issue. I am using the elementalx kernel on android 4.4.4 (currently on Carbon rom but have tried stock and other roms as well with same outcome). When the tablet reboots with the otg cable connected, it does not charge when it first starts up. To charge it, I have to physically unplug and replug the cord in the nexus. Any ideas?
Click to expand...
Click to collapse
you find a fix for this? i will try that command you posted but i need it to run at startup automatically if it works.
quicksilvr2006 said:
you find a fix for this? i will try that command you posted but i need it to run at startup automatically if it works.
Click to expand...
Click to collapse
Just use tasker to run the commands at startup...
Does this set of command still work with lollipop? I just tried a few times and it seems to have made no difference.
Thanks in advance!
Yeah im in the same boat. Soooooo many problems with this ****ty tablet. Knew i should have installed an iPad. They said this is the 'best' of android. It's ****ing terrible. People who are thinking of installing an android into your car? A word of advise. Dont do it.
-guy who has worked on nexus 7 2012, AND 2013 car install for more than a year.
jimmng said:
Yeah im in the same boat. Soooooo many problems with this ****ty tablet. Knew i should have installed an iPad. They said this is the 'best' of android. It's ****ing terrible. People who are thinking of installing an android into your car? A word of advise. Dont do it.
-guy who has worked on nexus 7 2012, AND 2013 car install for more than a year.
Click to expand...
Click to collapse
Do you feel better now?
Sent from my LG-D850 using XDA Free mobile app
It's been almost a year any way to accomplish charging without having to physically unplug the OTG and plug it back in. Im have timurs kernel but I want to use elemental so I can use marshmallow. Timur accomplished it somehow. Someone has to know how.
Qi Wireless Charging
samt3 said:
It's been almost a year any way to accomplish charging without having to physically unplug the OTG and plug it back in.
Click to expand...
Click to collapse
It is actually trivially easy to accomplish - on any kernel - it is called Qi Wireless Charging.
Android 6.0.1 kernel Quanta-V7-Flo with 'USB Host Mode Charging'
samt3 said:
It's been almost a year any way to accomplish charging without having to physically unplug the OTG and plug it back in. Im have timurs kernel but I want to use elemental so I can use marshmallow. Timur accomplished it somehow. Someone has to know how.
Click to expand...
Click to collapse
Test results for Android 6.0.1 Stock + Kernel 'Quanta-V7-Flo' with active 'USB Host Mode Charging' and inactive 'fast charging' (N7 is only is use when its connected to the USB Power):
Ampere values checked with one of the cheap 'USB Charger Doctor Voltage Current Meter Mobile Battery Tester':
0.45 A for N7 only
0.61 A for N7 + USB Ethernet adapter
I don't use the N7 in a car setup but this should be important for such setups:
-If the USB Y cable is connected before powering on the N7, the USB device was usable in Android after startup without need for reconnecting the USB cable
-If the USB was unplugged and reconnected the device, it was usable in Android
-Important: If the N7 goes to sleep, it can't recover the USB charging and USB devices after waking. You should set the display timeout to always on, which is right for a car setup or am I'm wrong?
I'm happy! :good:
I tried quanta. It does work except for on initial boot. Have to unplug and plug it back in to charge. Then it works fine turning the key on and off for power. However it doesn't mount the OTG devices again without unplugging it and plugging it back in.
Edit: I also have another problem was at work and didn't have time to add it. But my Nexus thinks it's still charging after disconnecting it from power supply through the OTG cable. When I turn the key off it quits charging for about 1 second then switch's back to saying it's charging again and continues to say it's charging even after cycling the key on and off. Only way to fix it is to disconnect the OTG straight from the tablet and plug it back in or boot it into recovery then back to system. Has done this thru multiple roms and kernels. Only kernel it doesn't do it on is Quanta. The thing is it didn't use to do it at all no matter what rom or kernel I was using. I even went as far as to change the charging port board cause I had another one in a old junk Nexus I have and still didn't fix it.
samt3 said:
I tried quanta. It does work except for on initial boot. Have to unplug and plug it back in to charge. Then it works fine turning the key on and off for power. However it doesn't mount the OTG devices again without unplugging it and plugging it back in.
Edit: I also have another problem was at work and didn't have time to add it. But my Nexus thinks it's still charging after disconnecting it from power supply through the OTG cable. When I turn the key off it quits charging for about 1 second then switch's back to saying it's charging again and continues to say it's charging even after cycling the key on and off. Only way to fix it is to disconnect the OTG straight from the tablet and plug it back in or boot it into recovery then back to system. Has done this thru multiple roms and kernels. Only kernel it doesn't do it on is Quanta. The thing is it didn't use to do it at all no matter what rom or kernel I was using. I even went as far as to change the charging port board cause I had another one in a old junk Nexus I have and still didn't fix it.
Click to expand...
Click to collapse
Did you try the glitch kernel?
0xcafebabe said:
Did you try the glitch kernel?
Click to expand...
Click to collapse
I've used it before but not on my current setup.
Assuming one of these kernels provides OTG + Fast Charging, what are the options for the Power-Down + Deep Sleep, then Power-Up + Wake?
Hi,
I have just bought and fitted a Eonon GA2114 Android unit
I have one or two issues please, and would really appreciate some help
1. When I hold the power button to shut the unit down, it says 'shutdown' for a second and the screen goes dark. When I power it on again it comes on immediately as if the stereo is switched on all along, just with the screen dimmed. (It does not boot up Android) - I should mention it is fitted into a campervan running off a leisure battery. Shouldn't make any difference I'd have thought but it is a permanent battery connection (No ignition on/off) is this a clue? I wondered if it was to do with the ACC wire if so?
2. When I do 'wake up' the Car Unit it seems to take quite a few seconds or so to 'prepare the SD card' - this can only refer to my permanently connected USB drive full of music (Via the rear of the unit) - surely this should be ready to use immediately the car stereo is on? It means I can't just switch on, and play music. Any ideas please as it is very annoying?
3. A brief one, what is the best locally stored Android music player to use please? for car use that is?
Many thanks for your hep
I must admit I am a little surprised to have no replies so far? Anyone pls?
Hi, is there anyone that can help me with this please. many thanks?
Any suggestions please? thanks
adriancollins said:
Any suggestions please? thanks
Click to expand...
Click to collapse
Does the unit come with root, if it doe you could download a reboot app, most require root to function.
I don't believe these units actually shutdown, just go into standby mode, you cab check with the ENON techs.
No root as far as I am aware, a good idea otherwise thank you. I am still unable to fully power off (Or reboot) the unit. It seems to draw a lot of power and will drain the Leisure Battery for sure. I have emailed Eonon a few days ago, but not heard anything back. Not sure if they are active in any of the forums for a quicker response?
As for the USB Memory Stick with music on, I am still having the problem of 'unexpectedly removed' and 'preparing SD card' each and every time the unit is first used / turned on. Any ideas please as it's driving me bananas! thank you
I have the same unit and yeah it says powering off and it isn't powering off at all, it is even still connected to my phone via bluetooth when it has supposedly powered off!
tiff_lee said:
I have the same unit and yeah it says powering off and it isn't powering off at all, it is even still connected to my phone via bluetooth when it has supposedly powered off!
Click to expand...
Click to collapse
Thanks for your reply, that is interesting. I have had two replies from Eonon so far. As I thought the ACC cable may be the culprit.
1. Unit can not shutting down completely
Please check whether you have connect the ACC wire always on BATT? If yes, this unit cannot turn off completely.
Please find the ACC control wire on the Fuse box location, then connect the ACC wire to the ACC control wire, the unit can turn on and off via key.
2. If you use the USB Memory Stick to play music? If so does yours have the delay issue as well? )Answer from Eonon copied below so far:
Yes, it will show message when you plug in or plug out SD/USB, this can not change.
But if it shows some error message that make the SD/USB would not work, would you please take a picture to show us?
adriancollins said:
Thanks for your reply, that is interesting. I have had two replies from Eonon so far. As I thought the ACC cable may be the culprit.
1. Unit can not shutting down completely
Please check whether you have connect the ACC wire always on BATT? If yes, this unit cannot turn off completely.
Please find the ACC control wire on the Fuse box location, then connect the ACC wire to the ACC control wire, the unit can turn on and off via key.
2. If you use the USB Memory Stick to play music? If so does yours have the delay issue as well? )Answer from Eonon copied below so far:
Yes, it will show message when you plug in or plug out SD/USB, this can not change.
But if it shows some error message that make the SD/USB would not work, would you please take a picture to show us?
Click to expand...
Click to collapse
I have the ACC wire connected correctly as when I turn the ignition off the stereo acknowledges this and turns off/powers down but that function is hard wired supposed to turning the unit off at the on/off/volume knob (while the ignition is on). Their answer is just avoiding the issue as the unit turns off fine with the ignition, it doesn't power down like it says it is when the ignition is on. I just turned my 'off' with the ignition on and could still connect to it via bluetooth....
I can't comment on point 2 as i've yet to rig my amps up and play any music!
tiff_lee said:
I have the ACC wire connected correctly as when I turn the ignition off the stereo acknowledges this and turns off/powers down but that function is hard wired supposed to turning the unit off at the on/off/volume knob (while the ignition is on). Their answer is just avoiding the issue as the unit turns off fine with the ignition, it doesn't power down like it says it is when the ignition is on. I just turned my 'off' with the ignition on and could still connect to it via bluetooth....
I can't comment on point 2 as i've yet to rig my amps up and play any music!
Click to expand...
Click to collapse
Mmmmmm, thats not quite so good then. I was thinking that it might be the ACC as mine is running from a permanently 'on' Leisure Battery. I will probably pop the stereo out and have a look in the next week or so as I can't really change the battery situation (The idea is so that I don't run the starter battery down as it is a CamperVan)
I must say though that I am impressed with the sound (I have been testing PowerAmp, and PlayerPro and they both look and sound STUNNING, the standard player kept skipping for me at least)
I'm still looking into the other thing (Memory Stick) it works, but it's annoying really
I just got my unit yesterday and installed, so far very good device.
I noticed there is a setting in setup to delay shutdown for 30 seconds, and up... Maybe you are not waiting long enough for complete shutdown.
If you had the ACC wired to Battery, the unit screen would not shut off (i think).
ACC being connected to a permanent live compounds the problem as whenever ACC is live i.e ignition turned on, you can't power the unit down at all even though holding down the power button it clearly states "shutting down" when in reality it merely turns the screen off.
Thank you tiff_lee, I think that is exactly what happens in my case (Just the screen goes off)
It is draining my 12v battery rather quickly! If I was to disconnect the ACC cable will I still be able to power it on and use normally? (In my case the car stereo works from a campervan leisure battery. The idea being that you can have the radio on at any time without the ignition having to be on. Also it doesn't drain your starter battery at all)
Many thanks
ACC is accessory power. Accessory power is only powered when a key is on. If you don't have it wired to a ACC source then it won't properly shut off. Wire the ACC with the power wires and put a toggle switch between the battery and the power wires. I would think that would solve the problem.
adriancollins said:
Thank you tiff_lee, I think that is exactly what happens in my case (Just the screen goes off)
It is draining my 12v battery rather quickly! If I was to disconnect the ACC cable will I still be able to power it on and use normally? (In my case the car stereo works from a campervan leisure battery. The idea being that you can have the radio on at any time without the ignition having to be on. Also it doesn't drain your starter battery at all)
Many thanks
Click to expand...
Click to collapse
If I understand your first post correctly you have the ACC connected all the time so yes the unit would effectively be on all the time hence the power drain. Leave the main power connected at all times as this also powers your memory, connect the ACC wire to a 12V+ supply via a toggle/selector switch and just turn it on (via toggle switch) when you want the unit on.
That aside though it doesn't change the fact that the unit does not power off when it says it is.
Hi
Been following this thread and having same issues I only have mine connected by the iso adapters and the unit doesn't seem to shut down fully,have had 1 flat battery so far after not using the van for several days on recharging battery and turning on it showed full start up screens.
Other issues are not being able to turn off the radio once turned on apart from in settings "force stop app"
No voice guidance in the Sygic GPS app.
Someone asked for a good music app,try N7 player,also Smart launcher is very good ,have it on all our Android stuff.
adriancollins said:
Hi,
I have just bought and fitted a Eonon GA2114 Android unit
I have one or two issues please, and would really appreciate some help
1. When I hold the power button to shut the unit down, it says 'shutdown' for a second and the screen goes dark. When I power it on again it comes on immediately as if the stereo is switched on all along, just with the screen dimmed. (It does not boot up Android) - I should mention it is fitted into a campervan running off a leisure battery. Shouldn't make any difference I'd have thought but it is a permanent battery connection (No ignition on/off) is this a clue? I wondered if it was to do with the ACC wire if so?
2. When I do 'wake up' the Car Unit it seems to take quite a few seconds or so to 'prepare the SD card' - this can only refer to my permanently connected USB drive full of music (Via the rear of the unit) - surely this should be ready to use immediately the car stereo is on? It means I can't just switch on, and play music. Any ideas please as it is very annoying?
3. A brief one, what is the best locally stored Android music player to use please? for car use that is?
Many thanks for your hep
Click to expand...
Click to collapse
I have bought a Pumpkin KD-C0224 Android car unit and it's working great.
1. Have met the battery drained issue before and the Pumpkin seller suggested me exchange the "ACC" and the "B+" of the iso adapter.
They explained that the “ACC” and the “B+” of my car is opposite to the iso adapter, so I tried and it worked.
2. Maybe your USB Memory Stick is beyond the unit can support, or you can try other USB device with less than 32GB to check.
3. I have Spotify on my unit and its great, I think.
Hello,
someone did you solve this problem? I use the same multimedia Eonon GA2114 and have the same problem .In the moment extinguish my car out inscription 'unexpectedly removed SD card' Just to give contact and back contact without starting the engine again my written 'unexpectedly removed SD card'.
After starting my written 'preparing SD card' and starts from the first song. I'm tired just listening to the same song Please if anyone can help.
I have a very similar problem which has only started to happen recently on my Eonon head unit.
The problem is when you turn the unit off it shows a message saying "storage unexpectedly removed". When you turn on the head unit again it has to remount the USB drive and it starts playing music again from the beginning of the MP3. It never remembers the last play position of the MP3. This happens on various makes of freshly formatted USB sticks. Its very annoying....
I have done a full factory reset, disconnected the power and also re-connected all the cables from the back of the unit - but this did not resolve the problem.
Not really sure what to try next...any suggestions would be very much appreciated!
Doggeh_Dawg said:
the USB drive
Click to expand...
Click to collapse
How is the drive powered?
on CM 12.1 and I can get SOME flashdrive to work otg, SOME of the time.
I tried stickmount and ex kernel, but it's the same (worst on ex kernel, can't even detect otg)
I tried using a powered usb hub to see if that was the issue (for some reason, the microusb port isn't giving power to the drive. is this normal?)
after several more testing, seems like there are 2 issues that is causing otg not to work all the time.
1. Power. Doesn't seem to be able to provide enough power for self powered usb devices (ie. flash drive, dac, etc..) or enough to maintain connection.
2. Microusb port. might be one of the reason why devices aren't getting enough power and/or not being detected.
I really think it's a power issue cause everything seems to run fine if I connect it to an external powered usb hub. I tried the same setup (flash drive and dac to an usb hub, no power) with my 1st gen Nexus 7 and it had zero issues.
so is there a way to raise or maintain 5v OUTPUT out the microusb port so it doesn't randomly disconnect otg devices?
I've been able to power A pretty heavy duty usb audio interface. I think I may have had that issue A couple times, but it was never A big deal for me.
I don't remember having the problem after enabling "OTG+Charging" in Elemental X kernels' aroma installer. Did you use that?
Also possibly (not likely) A Cyanogenmod issue. I haven't used that on the nexus 7 in A while though.
Wierd that flash drives don't stay on. Does it do that frequently? I've looked into "overvolting" the usb port A long time ago, it seemed to need A kernel change
Hello, XDA, Good morning.
So i was using an LG G3 D850 as an access point for a hot spot while my internet was down for a bit, So i connected my PC to my phones WiFi Hot-spot right? K.
Now I had the phone running like this for quite some time, 2-4 hours roughly. During this time I must have used about 4-5 gigs of data on my phone (don't care about the data use :laugh: ) and nearing the end of my abuse on the phones internet use I noticed that the screen doesn't want to turn on, but the phone is still on AND routing the access point still.
Fine fine, so When i decided to wrap it up and shut er' down, i powered the phone off. Attempt to reboot the phone was laggy at best and lucky to actually reboot the phone a couple times in this state. I powered down after failing to boot up a few times pulled the battery then plugged USB in and I Got the normal screen that you would get (can't remember what it looked like) if you plugged into the USB w/o a battery in. Then after the standard battery failed to operate correctly I stupidly tried a different battery, which was 2,600 MAH / 3.8 V Li-ion battery / 9.88 Wh SAMSUNG battery, I know.... stupid.... ( LG battery : 3,000mAh / 3.8v Li-ion battery / 11.4Wh
Now after All this battery sh*t, the phone did boot up once or twice with the above battery, but that was it. Now when I plug USB into phone w/o the battery in I get the triangle with a question mark and a picture of a cell phone and USB cable going into it. Thats the only screen that shows up, except for the green/red/blue blinking notification light at the top left corner! PHONE IS RECOGNIZED in DEVICE MANAGER and ONLY when I power down , cable in PC , hold volume + , insert cable , hold Volume + for about 5-8 seconds til I hear computer sound beep then I let go and I get LGE Android MTP device , LGE Mobile USB Composite Device and LGE Mobile USB Serial Port So i have some connectivity but no screen display unless , plugged in w/o battery. I have tried flashing kdz file for sh*ts and giggles to see if it would do the trick but still the same.
Wheres the veterans at ! Thanks in advance , Cheers!
Forgot to mention , that, Even right now the phone is plugged in blank screen still but being charged and will blink twice every minute or more, green notification light , top left. ***
Actually it blinks automatically or if i press the power button it will blink twice as well. . . What does this mean?!
Is download mode working?
eXpel said:
Hello, XDA, Good morning.
So i was using an LG G3 D850 as an access point for a hot spot while my internet was down for a bit, So i connected my PC to my phones WiFi Hot-spot right? K.
Now I had the phone running like this for quite some time, 2-4 hours roughly. During this time I must have used about 4-5 gigs of data on my phone (don't care about the data use :laugh: ) and nearing the end of my abuse on the phones internet use I noticed that the screen doesn't want to turn on, but the phone is still on AND routing the access point still.
Fine fine, so When i decided to wrap it up and shut er' down, i powered the phone off. Attempt to reboot the phone was laggy at best and lucky to actually reboot the phone a couple times in this state. I powered down after failing to boot up a few times pulled the battery then plugged USB in and I Got the normal screen that you would get (can't remember what it looked like) if you plugged into the USB w/o a battery in. Then after the standard battery failed to operate correctly I stupidly tried a different battery, which was 2,600 MAH / 3.8 V Li-ion battery / 9.88 Wh SAMSUNG battery, I know.... stupid.... ( LG battery : 3,000mAh / 3.8v Li-ion battery / 11.4Wh
Now after All this battery sh*t, the phone did boot up once or twice with the above battery, but that was it. Now when I plug USB into phone w/o the battery in I get the triangle with a question mark and a picture of a cell phone and USB cable going into it. Thats the only screen that shows up, except for the green/red/blue blinking notification light at the top left corner! PHONE IS RECOGNIZED in DEVICE MANAGER and ONLY when I power down , cable in PC , hold volume + , insert cable , hold Volume + for about 5-8 seconds til I hear computer sound beep then I let go and I get LGE Android MTP device , LGE Mobile USB Composite Device and LGE Mobile USB Serial Port So i have some connectivity but no screen display unless , plugged in w/o battery. I have tried flashing kdz file for sh*ts and giggles to see if it would do the trick but still the same.
Wheres the veterans at ! Thanks in advance , Cheers!
Click to expand...
Click to collapse
the good news the phone isn't bricked and it can't be unless harware failure, you will need to use the button combo to get into download mode and flash a kdz their are enough threads on how to so I won't write it again
v.konvict said:
Is download mode working?
Click to expand...
Click to collapse
I believe so, There is no display on the phone however, when its plugged into the computer I don't see anything in Device manager except I hear a sound on connection , then when I hit volume + and then insert the USB cable i get MTP driver, Com PORT driver, and CDC driver I believe.
suljo94 said:
the good news the phone isn't bricked and it can't be unless harware failure, you will need to use the button combo to get into download mode and flash a kdz their are enough threads on how to so I won't write it again
Click to expand...
Click to collapse
I have flashed a kdz already using LG flash tool 2014 method. But I will try the zip and dll method i guess. If there are other options i would love to know about them.
Refraining from having to short circuit the MOBO and wondering if this problem is as easy as getting a new battery and charger ?
Thanks, Wish i still had my jtag.... zzzzzzzzz
Hi!
I am planning to repurpose my Galaxy Nexus (Maguro) running CM13 as a media player/rear view camera viewer for my car.
I want to use a USB OTG camera, so I cannot use the micro USB port to charge the phone at the same time (or can I), so I tried ironing the power wires of the USB cable directly to he pins of the battery and it worked
I use a charger which provides power to the phone when the car engine is on, but the problem is that I need to turn on the phone manually every time...
Is there a way to make the phone boot automatically when it gets power?
I saw some threads for other phones which wanted to boot the phone when the charger was connected (not sure if that would be helpful for me but anyway). They achieved that by modifying a file called lpm in system/bin. However my phone doesn't have such file...
Thanks in advance for your help!
I found a file called pm and editted that one but nothing changed...
Help please!!!