ADB Doesn't Recognize Nexus 6p - Nexus 6P Q&A, Help & Troubleshooting

Hello all,
I recently dropped my phone, shattering the screen and rendering the LCD useless. I need to use my phone to access some important messages, so I am trying to use Android Control to emulate my phone until I can get a new one. The problem is I didn't have USB debugging turned on when I dropped it. To fix that, I am trying to use ADB and recovery mode to turn it on, but ADB can't/won't recognize my device. I have installed the universal adb driver and my phone shows up in the device manager, but when I run "adb devices" in the command prompt, nothing comes up. Any help is much appreciated!
Thanks!

lonshlon said:
Hello all,
I recently dropped my phone, shattering the screen and rendering the LCD useless. I need to use my phone to access some important messages, so I am trying to use Android Control to emulate my phone until I can get a new one. The problem is I didn't have USB debugging turned on when I dropped it. To fix that, I am trying to use ADB and recovery mode to turn it on, but ADB can't/won't recognize my device. I have installed the universal adb driver and my phone shows up in the device manager, but when I run "adb devices" in the command prompt, nothing comes up. Any help is much appreciated!
Thanks!
Click to expand...
Click to collapse
Did you have TWRP installed? (Unlocked bootloader?)
If not, I don't know of any way to turn on ADB.
If TWRP is installed you boot into recovery and you are good.

tech_head said:
Did you have TWRP installed? (Unlocked bootloader?)
If not, I don't know of any way to turn on ADB.
If TWRP is installed you boot into recovery and you are good.
Click to expand...
Click to collapse
Unfortunately I don't have TWRP installed

Unfortunately I don't have TWRP installed

No USB debugging and no twrp and no LCD ....
That's a no go.

Related

Soft brick? (No ROM installed but can sort of boot into recovery)

howdy y'all,
so im trying to help out my buddy. he currently has no os installed as well, but can boot to bootloader and twrp recovery 2.5. no idea how he has that but I figure I could just mount some zip files and be on my way. Currently whenever we try to do anything in twrp(ie wipe/mount) it is just hung up on unable to mount /radio even when all I have checked is system. I can't use adb or fastboot as far as I'm aware of; I've tried to use the unified android toolkit from skipsoft but its no dice since I was never able to turn on debug mode to begin with? So yeah any help would be much appreciated
oh and I know its not my cable or usb ports since the tablet can still charge.
Also this is the 2012 N7
Hi,
You'll need to get adb and fastboot working, best approach is to wipe and flash factory images through fastboot but may also need to use adb for e2fsck
http://forum.xda-developers.com/showthread.php?t=2277112
See this on getting fastboot working, best of luck!
demkantor said:
Hi,
You'll need to get adb and fastboot working, best approach is to wipe and flash factory images through fastboot but may also need to use adb for e2fsck
http://forum.xda-developers.com/showthread.php?t=2277112
See this on getting fastboot working, best of luck!
Click to expand...
Click to collapse
I don't understand how I'm supposed to get fastboot working since I was never able to enable debug mode on the device in the past let alone now that it has nothing installed. And from what I can understand from the instructions I need the drivers to be installed after I plug in while under debug mode for the sdk to work.
I attempted to install the nexus 7 driver from here: http://support.asus.com/download.aspx?SLanguage=en&m=Nexus+7&os=32
However it looks like I already have the files on my computer from a previous attempt with Skipsoft's Android toolkit?
Because of this I'm unsure of how to move forward with this fastboot business.
fastboot doesn't need debugging on or an os installed, just a functional bootloader
You will probably need to manually update the drivers yo the proper ones
I see, how do I go about manually installing this driver then? I'm assuming I need to go through some sort of windows device tree? Or can I just extract a file somewhere?
You can download usbdview (just search Google for a free download) to see what driver is selected when you plug in your tab easily
Or you will need to go into device manager and select to manually update the drivers, don't allow windows to select but manually choose it
There are loads of instructional videos on YouTube for you if needed
I know this is a super late response, but I never managed to get around to trying to find out how to do a manual install. Just tried today using the Nexus Root Toolkit v.1.9.9. I still can't figure out how to manual install the driver because my issue is that windows doesn't recognize anything is plugged in, and all of these guides do state that I should have had usbdebugging checked. I can't seem to find a specific guide that correlates to setting fastboot up exclusively like you mentioned.
Also, using usbdeview like you said I could see that I have installed a google nexus adb interface, a google galaxy nexus adb interface, as well as the mtp usb driver.
Sorry for all the handholding, but this really is an issue that I've never have encountered and I can't seem to manage.
Hey again
There is a fastboot guide in the first post I linked you to
If you can't get fastboot to recognize device in bootloader mode it is possible the USB port is broken, but more likely an issue with drivers, cord or PC
So try a new USB cable, or a different PC
Try try again with drivers, uninstall and reinstall
Unfortunately this type of trouble shooting is hard to do without device in hand

Broken Screen Issue + ADB

Hi Friends,
A buddy of mine has a Galaxy 5 with a broken screen. He has downloaded all of the required software.
the problem that when he enters the command “adb devices”, it does not show that his phone the recognized even though he can access it through his computer through the file system.
What should he do to correct this? Thanks in advance!
USB Debugging must be disabled, what does he want ADB for if he can already access it via USB? To Wipe?

nexus 6p not showing on device manager

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.

Bootloader no longer seen in 'adb devices'

After moving to Lineage 14 from stock 21s, I came to realize Android Pay will not work if the bootloader is unlocked.
So I went to go and lock the bootloader (with TWRP and Lineage still installed) and for some reason when I do a "adb devices" the phone is not seen.
I uninstalled the driver, reinstalled.
Tried unplugging, launching ADB, then plugging in..
Plugging in then launching ADB...
Then i put ADB on my wife's laptop (A PC I have never plugged the leeco pro 3 on to), then plugged in for the first time already in fast boot. Still no dice.
Anyone have any ideas?
How about using Magisk to bypass SafetyNet check instead of locking your bootloader?
kaneorotar said:
How about using Magisk to bypass SafetyNet check instead of locking your bootloader?
Click to expand...
Click to collapse
That is what I am doing, but I am still concerned about the ADB not seeing the phone in fastboot mode. If I have some type of catastrophic issue where i need to restore from fastboot i will be screwed.
ekeefe41 said:
That is what I am doing, but I am still concerned about the ADB not seeing the phone in fastboot mode. If I have some type of catastrophic issue where i need to restore from fastboot i will be screwed.
Click to expand...
Click to collapse
If you boot into fastboot mode (Volume Up + Power), does the phone show up in 'fastboot devices'?
If so, then IMHO you should be fine in catastrophic situation.
kaneorotar said:
How about using Magisk to bypass SafetyNet check instead of locking your bootloader?
Click to expand...
Click to collapse
kaneorotar said:
If you boot into fastboot mode (Volume Up + Power), does the phone show up in 'fastboot devices'?
If so, then IMHO you should be fine in catastrophic situation.
Click to expand...
Click to collapse
No, that is the issue, lol
Do you have adb drivers, and did you try completely deleting your device drivers from Device Manager, then reinstalling them by plugging your phone in via USB Debugging? Are you using the platform-tools package? Did you connect via USB Debugging, and did you authorize the computer (the message should pop up on your phone)? I can't fathom why your phone wouldn't be recognized...
sk8223 said:
Do you have adb drivers, and did you try completely deleting your device drivers from Device Manager, then reinstalling them by plugging your phone in via USB Debugging? Are you using the platform-tools package? Did you connect via USB Debugging, and did you authorize the computer (the message should pop up on your phone)? I can't fathom why your phone wouldn't be recognized...
Click to expand...
Click to collapse
Yes to everything, lol
And when I am connected to the phone while in the OS, ADB works fine, shows in when I "ADB devices"
Where'd you get your phone from? Banggood, Geekbuying, Gearbest? Did it come with a vendor ROM? Did it not pass SafetyNet on the original ROM it came with?
Are you following these instructions? Of course, replace the required stock ROM with the one for your version (x720 or x727). So does the issue come up when you reboot the phone via ADB while in the OS?
In any case, try asking on the http://www.leeco.re/ forums as well.

Activate USB Debugging

Hello Everyone!
Can somebody inform me on how to activate USB debugging when the screen is locked with a pin and the phone has stock software? Samsung phone with Nougat SW.
...
I have gotten this far with my windows 10 laptop which has adb tools installed:
Boot the phone the phone into Recovery Mode.
Select System Mount
Connect to PC and open CMD and change folder path where adb tools is located.
type adb devices in terminal
Now, the issue is that I see is a number followed by "unauthorized". I am trying to use commands such as adb shell, but seems like I am not allowed? I'm assuming it's because the phone is not USB Debug Enabled. I have a different phone which has USB Debug Enabled and adb shell commands are working perfectly. Any way to use shell commands or work arounds? Thanks in advance!
It is not possible to activate Debugging Mode with a locked screen. AFAIK it never was and it never will. And this is good as it is.
RossTeagan said:
3. Boot your phone into ClockworkMod Recovery, by pressing and holding the Power Button + Home Button + Volume Up or Down, depending on your phone
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Click to expand...
Click to collapse
Why or even HOW should he have ClockworkMod installed? your guide also is for making a Backup out of cwm when the touch is broken and not for activating debug mode
jaannnis said:
It is not possible to activate Debugging Mode with a locked screen. AFAIK it never was and it never will. And this is good as it is.
Why or even HOW should he have ClockworkMod installed? your guide also is for making a Backup out of cwm when the touch is broken and not for activating debug mode
Click to expand...
Click to collapse
Sorry, I thought it would help you...

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