Anyone else here with the bootloader problem of not being able to select anything if the usb is plugged in?
Saw the same behavior on two N7's so there's probably a reason for it.
anyone know how to fix this?
From what ive been able to gather, through trial and error, is that if you have the bootloader drivers installed and visible through fastboot , it should enable you to choose which you want and even boot into recovery. booting into the bootloader not plugged in allows me to switch through the options. however when i plug into usb it freezes until the computer recognizes it as an android bootloader device. attempting to reboot into recovery through the bootloader without USB plugged in has always failed for me.
I can let my n7 sit there for hours and my computer still can't use it. It detects it but it says its not working, and i can't use volume controls to change selection.
Related
I never thought I'd have to go as far as create a thread pleading for help, but after a lot of Google searching I still cannot find someone with the same problem.
I will explain:
I am trying to use fastboot, which I (don't think) I've any problems with in the past.
I can issue commands in normal use via adb from my PC fine.
I can adb reboot bootloader ok, and can get into the bootloader any other way just fine.
I can use the volume keys to navigate the options in the bootloader just fine.
The problem comes with I connect the USB to my PC whilst in fastboot.
Windows fails to recognise the device, and says it may have malfunctioned.
It won't allow me to reinstall the drivers successfully it seems, and seems to have a problem with the USB Host Controller too.
Fastboot immediately freezes, and I'm unable to even navigate using the volume keys, let alone issue commands from my PC.
My question then is twofold:
1. Is there likely to be a problem with the USB port on my device, or some sort of bootloader corruption?
2. Is it possible to return to stock Android without using fastboot?
Finally, I would like to stress that I've seen plenty of similar looking threads, but it seemed that the posters of those threads merely had problems getting in to the bootloader or recovery.
I haven't got that problem, the problem only arises when a USB is connected to the PC, the tablet becomes unresponsive only in bootloader mode.
If anyone has any advice to offer at all, I'd greatly appreciate it.
Additionally, if the problem is solved, I will post a detailed set of instructions in case anybody else should encounter a similar problem in the future.
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Update for anyone who happens to read this in the future:
[This guide](http://forums.androidcentral.com/ne...3923-guide-nexus-4-factory-image-restore.html) has a useful FAQ at the bottom which helped a little.
I think I managed to determine the problem was likely a duff usb connection, either on my Nexus or on my computer.
I was able to just about hobble through by keeping the cable in the same place.
In case it wasn't just this, this is what I did:
1. Flashed TWRP recovery from their app.
Went into bootloader and failed to do anything
2. Flashed CWM recovery.
Managed to be recognised in fastboot.
I still had problems with my Nexus 'malfunctioning' -- possible the USB.
I updated the drivers using the ones from [this thread](http://forum.xda-developers.com/showthread.php?t=2588979).
3. Flashed a new bootloader image immediately (there were rumours that a dodgy version had been released accidentally). [This](http://www.androidfilehost.com/?fid=23060877489996594) is the one I used.
Then I managed to get the stock ROM flashed, and the bootloader locked up again.
Fastboot freezes whenever USB plugged in
I'm having a problem with this step...
1. When booting to fastboot with any sort of USB plugged in, your buttons on the side may not respond. In this case, pull the cable and hold down power + Vol Down until it reboots. The buttons should now respond and you can plug USB back in if you wish.
the problem is that whenever the USB cable is plugged in, the buttons don't navigate through the options.
however, whenever the usb is NOT plugged in (and rebooted bootloader) the button work just fine.
I don't have a recovery currently installed.
The issue is not with drivers on the computer,
happens while usb plugged in both windows and linux or simply just plugged into a wall outlet to charge and with different USB cables.
I need to load fastboot but i'm having this issue. Is the device bricked without hope?
any help would be appreciated.
Nexus 7 2012 Model (grouper)
Boatloader version 3.34
I recently bought a refurbished 2012 Nexus 7 on 4.2. The only things that I have done on the phone are entering my Google account details and downloading a single app (papyrus). I then clicked to install the automatically downloaded software update (it downloaded 4.3), and after restarting the tablet was stuck on the Nexus X boot animation forever. Factory reset/cache wipes do not help.
I found drivers for the phone to be recognized while showing the X, and I found drivers for the phone to be recognized after selecting the a "apply update from ADB" option from stock recovery. However Windows does not recognize the phone at all in recovery mode before selecting that option. Nothing changes in the device manager when plugged/unplugged. Windows doesn't attempt to install anything. It's as if I unplugged the cord once it enters recovery from the bootloader. I assume USB debugging is off, because it would be at the default setting. I tried using the Flash Stock + Unroot option in the Nexus Root Toolkit with the Soft-Bricked/Bootloop setting in, but that fails in both normal recovery (with the device unnoticed) and sideload mode. I'm guessing that debugging needs to be on for this?
Does anyone have any suggestions for other things to try? I have no way of knowing what the original owner may or may not have done, and this was the first time that I restarted the device, so I have no way to know if the problem was caused by the OTA or not.
EDIT: It looks like I made the situation worse. I attempted running the Flash Stock + Unroot option from the bootloader. I am not sure what happened, but now the device starts at the Google page with green start in an arrow. I have the bootloader options, and start and recovery options give me a "booting failed" message in the top left and just stay on the google page. Restarting the bootloader gives me the normal bootloader android image and the options have the same effects.
For anyone who runs into this problem, I seem to have at least temporarily solved it.
I followed the advice here to manually flash the factory image. I am now back to where I was when I bought the phone, and I will immediately enable debugging and test it's ability to restart, connect in recovery mode, etc now.
EDIT: It can restart normally (with the unlocked logo), but it is still completely unrecognized in recovery unless I choose the sideload option like before. Should I return the tablet?
wioneo said:
For anyone who runs into this problem, I seem to have at least temporarily solved it.
I followed the advice here to manually flash the factory image. I am now back to where I was when I bought the phone, and I will immediately enable debugging and test it's ability to restart, connect in recovery mode, etc now.
EDIT: It can restart normally (with the unlocked logo), but it is still completely unrecognized in recovery unless I choose the sideload option like before. Should I return the tablet?
Click to expand...
Click to collapse
still have a problem?
Wrong drivers, try other USB ports. Had that happen with another tablet. Only recognized in adb side load with galaxy nexus driver loading, possibly from universal adb drivers... Switched to a port on the other side and correct drivers finally worked.
Sent from my Le Pan TC1020 using Tapatalk
norwoodesteel said:
still have a problem?
Click to expand...
Click to collapse
As far as I know, no. I was never able to get the device is to be detected by my computer while in stock recovery mode, however it was detected after I flashed ClockworkMod Recovery. So I still have no idea what was causing that problem, but it is no longer relevant.
Hey guys I tried to connect my nexus 7 to my Windows 7 laptop but nothing popped up it just showed as charging on my n7 I've tried update the drivers and different cables and different laptops too but it's all the same, even fastboot doesn't show up or mtp in twrp, any ideas how to fix this guys?
Anyone got any idea how to fix this problem?
Hey,
Have you tried enabling USB debugging in Settings > Developer Options?
Fobos531 said:
Hey,
Have you tried enabling USB debugging in Settings > Developer Options?
Click to expand...
Click to collapse
Cheers mate but yep I tried that and nothing changed
I'm in the same boat. Had this problem for a long while, almost had my guarantee expire so I had it fixed. Not sure what caused it, or what fixed it. But couple of weeks later I was transfering some files through the now working USB port and accidently touched the cable - the device lost connection mid-transfer and since then I was unable to use the USB to transfer files, or connect the device to anything but the charger..
Along comes the 5.1 OTA which I decide to install and mid-install there was an error and the device soft-bricked - I can't boot it, it shows the Android robot with a red traingle and exclamation mark and 'No command.' written under it, at which point it reboots after a couple of minutes.
I can access recovery and fastboot mode and excecuted a factory reset but to no avail. Does anyone know how to fix the USB so that I can reflash stock and make my device work again?
Also, any ideas if one could bypass the use of the USB port in fixing the softbrick would also be helpful.
Armeddy said:
I'm in the same boat. Had this problem for a long while, almost had my guarantee expire so I had it fixed. Not sure what caused it, or what fixed it. But couple of weeks later I was transfering some files through the now working USB port and accidently touched the cable - the device lost connection mid-transfer and since then I was unable to use the USB to transfer files, or connect the device to anything but the charger..
Along comes the 5.1 OTA which I decide to install and mid-install there was an error and the device soft-bricked - I can't boot it, it shows the Android robot with a red traingle and exclamation mark and 'No command.' written under it, at which point it reboots after a couple of minutes.
I can access recovery and fastboot mode and excecuted a factory reset but to no avail. Does anyone know how to fix the USB so that I can reflash stock and make my device work again?
Also, any ideas if one could bypass the use of the USB port in fixing the softbrick would also be helpful.
Click to expand...
Click to collapse
Do you twrp installed mate?
No, I do not.
Hi, my 6p will not show up on my PC. Have tried installing drivers, different PC, different cable but nothing works.
I recently upgraded to android O. I extracted the files from system image and flashed boot image, vendor image, and system. But now when I try to go into recovery it says no command and I lost root access but my bootloader is unlocked. I never flashed the recovery thinking TWRP would stay intact but I guess I was wrong. Normally I would just use ADB and fix it but hence my problem. Is there any way to root without PC or any way I can fix my situation?
Having the same exact issue here, hope someone has a way to fix it.
sonysingh1983 said:
Hi, my 6p will not show up on my PC. Have tried installing drivers, different PC, different cable but nothing works.
I recently upgraded to android O. I extracted the files from system image and flashed boot image, vendor image, and system. But now when I try to go into recovery it says no command and I lost root access but my bootloader is unlocked. I never flashed the recovery thinking TWRP would stay intact but I guess I was wrong. Normally I would just use ADB and fix it but hence my problem. Is there any way to root without PC or any way I can fix my situation?
Click to expand...
Click to collapse
So your phone will boot into the OS, or not? If so, make sure USB debugging is set to "on" in Developer Settings. Can you put your device in fastboot mode by holding down the volume down button before hitting the power button? The "no command" means you are in (stock) recovery. You then have to hold the power button down while using the volume buttons to navigate. Power button is confirm. Get your phone into bootloader mode and use ADB to flash TWRP again. @meoshe
v12xke said:
So your phone will boot into the OS, or not? If so, make sure USB debugging is set to "on" in Developer Settings. Can you put your device in fastboot mode by holding down the volume down button before hitting the power button? The "no command" means you are in (stock) recovery. You then have to hold the power button down while using the volume buttons to navigate. Power button is confirm. Get your phone into bootloader mode and use ADB to flash TWRP again. @meoshe
Click to expand...
Click to collapse
Yes phone is working fine. Debugging is on. Can't use ADB phone does not get recognized by PC, only charges. Dint even get the pull down notification once I connect usb. Tried changing connection to mtp in developer options also. Nada. Nothing works to fix it. I'm thinking my charging port might have something wrong with it I don't know. I'm stuck not having root atm.
sonysingh1983 said:
Yes phone is working fine. Debugging is on. Can't use ADB phone does not get recognized by PC, only charges. Dint even get the pull down notification once I connect usb. Tried changing connection to mtp in developer options also. Nada. Nothing works to fix it. I'm thinking my charging port might have something wrong with it I don't know. I'm stuck not having root atm.
Click to expand...
Click to collapse
Gotcha. What about the other points? Entering bootloader mode from a powered off state, and that you are in Recovery mode (no command), and navigating thru it with the power+volume buttons?
v12xke said:
Gotcha. What about the other points? Entering bootloader mode from a powered off state, and that you are in Recovery mode (no command), and navigating thru it with the power+volume buttons?
Click to expand...
Click to collapse
Yes that works. Thank you. But still can't root phone and can't flash TWRP. Was looking at a root APK but not sure if they will work with O. If I could root then I could install TWRP thru it's app but I need root for that.
You can't root the phone until you have a working custom recovery. Focus on either fastboot flashing or fastboot booting TWRP.img
v12xke said:
You can't root the phone until you have a working custom recovery. Focus on either fastboot flashing or fastboot booting TWRP.img
Click to expand...
Click to collapse
How do I go about fastboot booting TWRP image?
I can get into bootloader from phone but I can't use a PC.
I did read your OP, but this sounds like a driver issue. There are two drivers that need to be installed first the USB and then fastboot. Since you can boot the device and use it, maybe you should try NRT by Wugfresh to install, test and confirm the drivers are properly installed. Booting or flashing TWRP is just a different command. Instead of fastboot flash recovery twrp.img, you use fastboot boot recovery recovery.img. The NRT toolkit can also either boot or flash a recovery image.
EDIT: Also try "Revoking ADB debugging" and re-enabling @sonysingh1983
sonysingh1983 said:
Yes phone is working fine. Debugging is on. Can't use ADB phone does not get recognized by PC, only charges. Dint even get the pull down notification once I connect usb. Tried changing connection to mtp in developer options also. Nada. Nothing works to fix it. I'm thinking my charging port might have something wrong with it I don't know. I'm stuck not having root atm.
Click to expand...
Click to collapse
Hi, just tried the mtp setting in developer options. Didn't get it the first time but now am able to access internal storage. I have plug sound app from play installed and I get a notification sound when plugging and unplugging. First try there was no sound when changing from charging to mtp. Ok after repeating it. Hope that helps.
Just as a follow up I got my win10 pc to recognize my O flashed nexus. I booted into bootloader after I had updated my sdk and drivers through android studio. It recognized the phone but nothing was happening. I rebooted into the os and the access allow prompt popped up on the phone and adb was able to see it under listed devices.
Hi everyone, I try booting into EDL mode both using the button combo and the adb reboot edl command, and both just freeze the phone. I'm given a black screen that doesn't respond to button presses or plugging into the charger, and I have to wait for the battery to die before it'll start charging, after which I can turn it on normally.
My PC says 'USB device descriptor failed' when the phone is in this mode, even though when it's turned on normally I can transfer files over and whatnot just fine. I've used different cables and different PCs with the same result. Anyone know how to fix this? My main objective is to root so I can get rid of ads system wide. Thanks
Did you figure out how to fix this? I'm having the same problem now, didn't have it before.