So I was following the instructions here.
http://forum.xda-developers.com/g4/development/stock-h815-20a-stock-images-kdz-t3232282
and my G4 is in a bootloop after step 7 (reboot into twrp). Gets a second or two into the animated LG logo then resets.
I want to get back into fastboot mode or recovery so I can flash again, but no button combo does anything, (p+d or p+u, held, or with the short gap as in many descriptions). If I hold all three buttons, it shows imei and a barcode, but I can't go anywhere from this screen.
It's boot loader unlocked as per LG official unlock, and still says so in tiny writing top left when first booting.
Can anyone give me some tips on how to get this thing back into fastboot mode? I have a mac with adb and fastboot working well.
Thanks,
milesritzy said:
There were three methods outlined in the post, but i think this should help you...
In order to successfully complete this method a computer will be required. A connection between your smartphone and your PC will also have to be ensured, so on your LG G4 gain developer rights and then check USB debugging – go to “menu – settings – about phone” and tap several times on built number and then access “menu – settings – developer options”. Also, on your PC flash Android SDK by following: install Android SDK on Windows or set up ADB on MAC OS X / Linux. Don’t forget to charge your handset before going any further and then apply:
Connect your LG G4 with your computer via USB cable.
On your PC access the Android SDK folder.
There, open a command prompt window: press and hold Shift keyboard key and then right click on any blank space.
In the cmd window you have to execute the following command: “adb reboot bootloader”.
Enjoy.
Conclusions
Click to expand...
Click to collapse
I'm familiar with using adb to reboot into bootloader, That's how I got this far. But it only works if you have a working OS with developer options for adb to connect to.
Unfortunately I don't have a working OS, or working anything else.
Hi,
Try posting your question here:
G4 Q&A, Help & Troubleshooting
The experts there may be able to help.
Good luck!
Related
I have a Moto G 4g. ADB recognizes the cell and I can restart it in fastboot mode, but when I check in the terminal with:
Code:
fastboot devices
Nothing appears, and if I go on with
Code:
fastboot oem get_unlock_data
It gets stuck at
Code:
< waiting for device >
I tried as a user and as root on an Archlinux machine with android-udev rules as shown in the Archlinux wiki (sorry, i can't put the link). AP Fastboot fast boot menu shows that the cell is locked.
Hi,
You can try a different cable, or USB port on the pc...or even a different pc. Until fastboot devices detects your device, there's nothing you can do.
Reinstall drivers...and you are on the bootloader mode right?
If none of that helps, you can ask in your device section for help....
http://forum.xda-developers.com/moto-g/help
Good luck!
Hi
I've tried with a win 7 machine and i got fastboot working on my phone after installing the drivers. Now i'm able to do the thing i want to, but the problem still persist in linux, so i don't know if i close this thread or leave it open for someone who can solve this.
trichocereus said:
Hi
I've tried with a win 7 machine and i got fastboot working on my phone after installing the drivers. Now i'm able to do the thing i want to, but the problem still persist in linux, so i don't know if i close this thread or leave it open for someone who can solve this.
Click to expand...
Click to collapse
Please start one in your section. Xda Assist is here to help navigate the site, not for support.
Thanks!
Firstly, i have tried things mentioned here: http://forum.xda-developers.com/google-nexus-5/help/nexus-5-stuck-boot-loop-lollipop-t3098632 and also tried using "Nexus Root Toolkit".. both with no luck. My Nexus 5 doesn't get past those 4 spinning animated dots and none of the hacks so far worked.
I tried to flash it with OEM Image but adb cant find my phone. I'm using the OEM Cable and Device Manager on my PC lists only one entry "ADB Interface". What to do?
> adb.exe devices
List of devices attached is blank.
-kvsrkrishnan
In order to flash the firmware you need to be in fastboot mode (powered off phone, press and hold power+vol up+vol down until the menu appears).
Once you're there, you can run "fastboot devices" to see if it's connected correctly. If it's not, you're missing a driver. If it is, follow the instructions from google's website.
Hi,
I'm looking for some assistance to unbrick an Allview Viva P8 Pro tablet.
All this mess started from looking after some disk space to install more apps on on the default second partition.
First I've tried some tools like app2sd with no luck and finally decided to try adb/fastboot way, using a linux machine, to root the device.
Before starting the root procedure i was able to boot into recovery mode and while being into recovery mode I could see the tablet as a google device with the proper vendor id 0x18d1. Also "adb devices" command could find the device as expected. Right after issuing "adb restart bootloader", i cannot enter into recovery mode and it hangs with the logo displayed on the screen, i think it's a boot phase before entering into recovery mode.
I can still see it as usb attached device, not with google vendor id but identified as "Onda unverified", with vendor id 0x1f3a. Windows OS finds it as Android Bootloader Interface USB Developer and that's it. I've tried to install some drivers to establish communication but with no luck so far.
Thank you in advance.
iulian.popa said:
Hi,
I'm looking for some assistance to unbrick an Allview Viva P8 Pro tablet.
All this mess started from looking after some disk space to install more apps on on the default second partition.
First I've tried some tools like app2sd with no luck and finally decided to try adb/fastboot way, using a linux machine, to root the device.
Before starting the root procedure i was able to boot into recovery mode and while being into recovery mode I could see the tablet as a google device with the proper vendor id 0x18d1. Also "adb devices" command could find the device as expected. Right after issuing "adb restart bootloader", i cannot enter into recovery mode and it hangs with the logo displayed on the screen, i think it's a boot phase before entering into recovery mode.
I can still see it as usb attached device, not with google vendor id but identified as "Onda unverified", with vendor id 0x1f3a. Windows OS finds it as Android Bootloader Interface USB Developer and that's it. I've tried to install some drivers to establish communication but with no luck so far.
Thank you in advance.
Click to expand...
Click to collapse
Greetings!
Thank you for using XDA Assist.
Please consider posting your question here:
http://forum.xda-developers.com/android/help
You'll receive expert advice there.
Good luck!
Good afternoon everyone
I got my K1 for Christmas and I've been trying to root it for a few days but I can't get that far because I can't get the bootloader unlocked.
I've been following the guide based off of Nvidia's website
I've activated USB Debugging mode as seen here . Now once I've authorized the PC using the tablet. Once I run cmd in administrator mode I run
Code:
adb devices
I am able to get the serial and it says it's authorized. However if I go into Fastboot. if I check for devices it just goes back to the prompt, and if I try to run the unlock command it just gets stuck on <waiting for devices> (I've attached a screenshot here.)
At first I thought this was an issue with the OS/Drivers because I am on Win10 x64, and the shield drivers gave some error about driver incompatibility. So I loaded up a VM with win7 x32. However I am running into the exact same issue once I get to fastboot; the tablet just doesn't want to cooperate. I've booted into fastboot manually Where the options are:
Code:
[nvtboot] (version UNDEF_BUILD)
[bootloader] (version UNDEF_BUILD)
Device - locked
Continue
Fastboot Protocol
Recovery Mode
Restart
Poweroff
Nothing is recognized from there either. I've also tried multiple cables, since the Shield doesn't come with any. Anyways I've searched the older threads here for help but none of them have given me any luck. If there's something I can try I would definitely be open to hearing it and trying, I just don't know what the issue could be.
Thanks for your time everyone.
You have boot into the bootloader before being able to use fastboot. Just reboot your device and hold vol- during startup. The tablet will show some console messages, offering some options. If you see that screen, you can use fastboot.
bob3rt said:
Good afternoon everyone
I got my K1 for Christmas and I've been trying to root it for a few days but I can't get that far because I can't get the bootloader unlocked.
I've been following the guide based off of Nvidia's website
I've activated USB Debugging mode as seen here . Now once I've authorized the PC using the tablet. Once I run cmd in administrator mode I run
Code:
adb devices
I am able to get the serial and it says it's authorized. However if I go into Fastboot. if I check for devices it just goes back to the prompt, and if I try to run the unlock command it just gets stuck on <waiting for devices> (I've attached a screenshot here.)
At first I thought this was an issue with the OS/Drivers because I am on Win10 x64, and the shield drivers gave some error about driver incompatibility. So I loaded up a VM with win7 x32. However I am running into the exact same issue once I get to fastboot; the tablet just doesn't want to cooperate. I've booted into fastboot manually Where the options are:
Code:
[nvtboot] (version UNDEF_BUILD)
[bootloader] (version UNDEF_BUILD)
Device - locked
Continue
Fastboot Protocol
Recovery Mode
Restart
Poweroff
Nothing is recognized from there either. I've also tried multiple cables, since the Shield doesn't come with any. Anyways I've searched the older threads here for help but none of them have given me any luck. If there's something I can try I would definitely be open to hearing it and trying, I just don't know what the issue could be.
Thanks for your time everyone.
Click to expand...
Click to collapse
Adb works in normal mode.
Fastboot works in Bootloader mode.
Reboot to BL and type "fastboot devices", if no device go to K1 and select "fastboot protocol". Select on/yes.
dzidexx said:
Adb works in normal mode.
Fastboot works in Bootloader mode.
Reboot to BL and type "fastboot devices", if no device go to K1 and select "fastboot protocol". Select on/yes.
Click to expand...
Click to collapse
Hey there, sorry for my late reply, I've been swamped with work. I've tried your advice with no luck so far.
I can reboot to the bootloader, but when I select "fastboot protocol" I don't get to choose Select on/yes. it just refreshes the screen with the same options that I listed above. If you'd like when I get home I can provide a screenshot of my tablet so you can see the options, but I'm not getting anything like you described. Am I missing something?
Thank you for your time so far helping me.
Connect k1 to pc, type in cmd:
adb devices
adb reboot bootloader
fastboot devices
/Enable fastboot protocol on k1, type again/
fastboot devices
Give here screenshot from pc - all command/answers in cmd. @bob3rt
I had the same issue and lasted untill I tried different usb cable
Shield K1 connectivity is very sensible to cable quality
try others
dzidexx said:
Connect k1 to pc, type in cmd:
adb devices
adb reboot bootloader
fastboot devices
/Enable fastboot protocol on k1, type again/
fastboot devices
Give here screenshot from pc - all command/answers in cmd. @bob3rt
Click to expand...
Click to collapse
Hey Sorry again for a late response! However the good news is that I got it working!
What I ended up doing was hooking up the tablet to my Raspberry Pi with MATE and running adb/fastboot there. I originally ran into the same issue, but since I was able to sudo fastboot everything was recognized and seemed to work fine. I appreciate all of your help, and I apologize once again for the late replies!
For those that don't have a Raspberry Pi to follow the OP solution (like me), it's likely that your drivers aren't up to date on your PC.
Go here... https://docs.nvidia.com/gameworks/content/devices/shield_flashing_from_image.htm
And follow the initial instructions in the introduction paragraph and get yourself NVIDIA CodeWorks for Android. Once downloaded and installed you'll then see the shield in your fastboot devices list.
:good:
0mad said:
For those that don't have a Raspberry Pi to follow the OP solution (like me), it's likely that your drivers aren't up to date on your PC.
Go here... https://docs.nvidia.com/gameworks/content/devices/shield_flashing_from_image.htm
And follow the initial instructions in the introduction paragraph and get yourself NVIDIA CodeWorks for Android. Once downloaded and installed you'll then see the shield in your fastboot devices list.
:good:
Click to expand...
Click to collapse
Worked like a charm! Thanks.
Hi, I'm trying to unlock my phone so I can install Kali Linux on my A466BG. I've read a lot on the web but came to a problem. I've got Android SDK on my PC and installed platform-tools. My device shows up after entering "adb devices." I've enabled developer mode and usb debugging and OEM unlocking. My problem is...I can't unlock the bootloader and use fastboot. After pressing power and up volume I get into the menu (and I actually reset my phone to factory settings so I'll have more space) but I can't find bootloader. My phone shows up fine on my PC and under devices, but when I switch to the other menu (with reset options) it doesn't show up anymore. Not even under "adb devices." I tried entering "adb reboot-bootloader" but it just restarts and goes to the normal android phone screen. I tried "fastboot -i 0x1bbb oem device-info" and it says "waiting for device." I'm not sure how to boot into fastboot and unlock my bootloader. Or why my phone doesn't show up on my PC after pressing power and up volume. Please reply with instructions. Thank you
Hi, me again. I found a video on YouTube on how to install Kali Nethunter on Android phones. I got it and now I'm installing Metasploit. It's just the command line but that should work. Check You Tube on "Nethunter without root" if you want to know. Thanks
I'm back...Not satisfied with Nethunter on Termux. I would like to know how to root the phone and install Kali. Can anyone look at the above question and reply with how to root my Alcatel A466BG? I'll check back tomorrow. Thanks in advance!