Develop Bugs

Fasboot unlocking hangs - can't detect phone when it's in bootloader mode?

Hi.
Trying to flash a ROM to a Nexus 5X.
I have enabled OEM unlocking and USB debugging.
When I enter the command 'fastboot flashing unlock', I get '< waiting for device >' and it just stays there for ever and ever and ever.
I think this is happening because the computer isn't detecting the phone in bootloader mode. When the phone is on, in the normal Android state, my computer lists it when I type 'adb devices'. But when I put the phone in bootloader mode and type 'adb devices', nothing comes up.
Do I need to install different drivers?
Thanks.

Hiltil said:
Hi.
Trying to flash a ROM to a Nexus 5X.
I have enabled OEM unlocking and USB debugging.
When I enter the command 'fastboot flashing unlock', I get '< waiting for device >' and it just stays there for ever and ever and ever.
I think this is happening because the computer isn't detecting the phone in bootloader mode. When the phone is on, in the normal Android state, my computer lists it when I type 'adb devices'. But when I put the phone in bootloader mode and type 'adb devices', nothing comes up.
Do I need to install different drivers?
Thanks.
Click to expand...
Click to collapse
Replying to my own thread to say I figured it out
Although 'adb devices' didn't show the phone, 'fastboot devices' did
The problem wasn't that the computer wasn't seeing the phone; it was that I'd been using the wrong command. 'fastboot flashing unlock' didn't work, but 'fastboot oem unlock' did

You must reinstall fastboot drivers on computer.

Pc not recognizing watch in fastboot

Hey,
trying to flash the preview. Enabled adb in dev. settings and when the watch is normally powered on i see my watch in adb devices. However, after typing adb reboot bootloader and being in fastboot mode, it doesnt find my device.
Short said: PC recognizes watch on adb, but not on fastboot in fastboot mode, have tried many adb versions etc. but didnt help.
It also says in device-manager "Android", with a yellow triangle when being in bootloader/fastboot mode.
Cables are ok!!
Thanks for any help!

You need drivers to be installed.
Mike

Michael1200 said:
Hey,
trying to flash the preview. Enabled adb in dev. settings and when the watch is normally powered on i see my watch in adb devices. However, after typing adb reboot bootloader and being in fastboot mode, it doesnt find my device.
Short said: PC recognizes watch on adb, but not on fastboot in fastboot mode, have tried many adb versions etc. but didnt help.
It also says in device-manager "Android", with a yellow triangle when being in bootloader/fastboot mode.
Cables are ok!!
Thanks for any help!
Click to expand...
Click to collapse
If you just type "flash-all.bat" (no quotes) and hit Enter it should still work. It does for me.

fastboot devices doesn't see LG G4 (H811VK) Tmobile

I am trying to root LG G4 H811 (Tmobile).
I downloaded LGMobileDriver_WHQL_Ver_4.2.0.exe from LG web site and installed.
I enabled debug on phone.
Download and unzipped latest platform-tools-latest-windows (adb and fastboot) from https://developer.android.com/studio/releases/platform-tools.html
When I connect phone to laptop via USB and run adb devices, i see my phone
When i run "adb reboot bootloader" the phone does not boot into boot loader, but reboot normally.
So I powered off phone. Pressed up vol and connected USB. The phone shows "Download".
Now when I run fastboot devices, fastboot does not see the phone.
Please help me root my phone. I have tried this on two laptops, same result. Also I have tried USB2.0 and USB3.0 ports same result (fastboot cannot see the phone).
What else I can try?
Thanks

you must enable "Enable OEM Unlock" in the same menu of "USB Debug", then you can use "adb reboot bootloader".

Thank you, thank you, thank you. That did the trick. "adb reboot bootloader" is working and fastboot is able to see the phone.

Unable to get xA2 in fastboot mode

Hi there,
strugggling to get the xa2 into fastboot mode so I can flash a new boot.img and root. I've enabled OEM unlocking and installed the USB drivers. the command 'adb reboot fastboot' doesn't work, just reboots the phone. adb over usb works fine. The official method to get into fastboot 'plug in USB whilst holding vol up/down' also doesnt allow me to get itno fastboot mode, phone just stays blank with a notification LED. I use 'fastboot devices' to see it if it connected. I've tried this on 2 PCs now to no avail
I'm thinking maybe the fastboot drivers are wrong?
Does anyone have any other suggestions or help?
Thanks

jaw2floor said:
Hi there,
strugggling to get the xa2 into fastboot mode so I can flash a new boot.img and root. I've enabled OEM unlocking and installed the USB drivers. the command 'adb reboot fastboot' doesn't work, just reboots the phone. adb over usb works fine. The official method to get into fastboot 'plug in USB whilst holding vol up/down' also doesnt allow me to get itno fastboot mode, phone just stays blank with a notification LED. I use 'fastboot devices' to see it if it connected. I've tried this on 2 PCs now to no avail
I'm thinking maybe the fastboot drivers are wrong?
Does anyone have any other suggestions or help?
Thanks
Click to expand...
Click to collapse
Hi
Install "5 seconds adb drivers"
Connect the turned off phone to PC via USB just pressing volume down button (no power) and keep pressing it until you see the LED turning green or blue.
Here u have! :highfive:

faby GT said:
Hi
Install "5 seconds adb drivers"
Connect the turned off phone to PC via USB just pressing volume down button (no power) and keep pressing it until you see the LED turning green or blue.
Here u have! :highfive:
Click to expand...
Click to collapse
Hi thanks for getting back to me,
I assume you meant the '15 second installer', which I just did just install successfully. I am still unable to see the device with 'fastboot devices' command.
Other info: I have factory reset the phone, made sure oem unlock is checked, tried the same process on another computer. I can get adb mode to work fine, but the command 'adb reboot fastboot' just reboots the phone as usual

jaw2floor said:
The official method to get into fastboot 'plug in USB whilst holding vol up/down' also doesnt allow me to get itno fastboot mode, phone just stays blank with a notification LED.
Click to expand...
Click to collapse
That is the correct behaviour.
Blue LED = Fastboot mode
Green LED = Flash mode (for reflashing stock firmware with XperiFirm in case EVERYTHING is broken)
Install these drivers:
https://adb.clockworkmod.com/
When in Fastboot mode, go to device manager, there is an Android device in there (may also be called MTP device).
In the device manager, install a new driver for that and use the ADB driver from C:\Program Files (x86)\ClockworkMod\Universal ADB Driver
Windows will tell you that it's the wrong driver. Install it anyway and Fastboot will recognize your XA2 now.

schmatzler said:
That is the correct behaviour.
Blue LED = Fastboot mode
Green LED = Flash mode (for reflashing stock firmware with XperiFirm in case EVERYTHING is broken)
Install these drivers:
https://adb.clockworkmod.com/
When in Fastboot mode, go to device manager, there is an Android device in there (may also be called MTP device).
In the device manager, install a new driver for that and use the ADB driver from C:\Program Files (x86)\ClockworkMod\Universal ADB Driver
Windows will tell you that it's the wrong driver. Install it anyway and Fastboot will recognize your XA2 now.
Click to expand...
Click to collapse
If it won't work, after that just go to devices and printers and delete Xperia XA2. It will work.
Else, after installing 15 seconds, inside device manager, update the driver of your phone (or mtp device), select local, then Android device, then fastboot. Disconnect the phone and reconnect as before (volume down)

Fastboot is VOL. UP (on this device)! (Not vol. down)
So basically turn off the device, hold Vol. UP and simply connect to USB, hold Vol. UP until LED is steady blue and you are set.
Note: VOLUME UP activates fastboot and VOLUME DOWN enables flashmode and/or recovery mode

Similar trouble here.
1. VOL UP + plug in USB: Blue led blinks once, then phone shows it's charging (turned off)
2. adb reboot bootloader: Phone just turns off

Corias said:
Similar trouble here.
1. VOL UP + plug in USB: Blue led blinks once, then phone shows it's charging (turned off)
2. adb reboot bootloader: Phone just turns off
Click to expand...
Click to collapse
I had the same issue with my XA2.
The solution (at least for me) was: different USB cable and different USB-port. As it turns out, my cable was somehow worn out (though data transfer and charging was working quite well). Going into fastboot, the blue led lit very short time and then the phone restarted. Furthermore on my PC it somehow only worked on the one USB port and not the other (both USB 3.0).
--> Maybe trying the most obvious might help also some of you

BoernMe said:
I had the same issue with my XA2.
The solution (at least for me) was: different USB cable and different USB-port. As it turns out, my cable was somehow worn out (though data transfer and charging was working quite well). Going into fastboot, the blue led lit very short time and then the phone restarted. Furthermore on my PC it somehow only worked on the one USB port and not the other (both USB 3.0).
--> Maybe trying the most obvious might help also some of you
Click to expand...
Click to collapse
Did solve this by connecting to different PC. No cable/port/hub change did help. Looks like there was some trouble with drivers (though the same PC fastboots Z3 Tablet Compact perfectly).

Same
I'm also having the same issue with my Xperia XA2 Ultra. (boy that's a mouthful)
Phone model is H3223.
Host OS is Windows 10 Pro v. 2004.
Using latest Android SDK tools (i.e. ADB and Fastboot platform tools): platform-tools_r30.0.5-windows. Got it directly from Android site.
I think I had a previous driver for Android already installed or somehow Windows got it. ADB worked, Fastboot didn't. Read online about someone on this forum getting it to work by using XZ2 driver from Sony as they evidently don't have a published driver for this device. The person who posted this solution had reported problems with this driver recently. I tried it anyway.... ADB commands work and my phone shows up when listing devices. Reboot into fastboot mode and the only thing my phone does is show a blue light indicator... no splash screen or logo. To me this means it's starting fastboot but my driver isn't working with it to recognize it as any commands for fastboot return nothing or fail. It doesn't show up under fastboot devices command.
Does anyone have a clue as to what to do?

that_random_guy said:
Same
I'm also having the same issue with my Xperia XA2 Ultra. (boy that's a mouthful)
Phone model is H3223.
Host OS is Windows 10 Pro v. 2004.
Using latest Android SDK tools (i.e. ADB and Fastboot platform tools): platform-tools_r30.0.5-windows. Got it directly from Android site.
I think I had a previous driver for Android already installed or somehow Windows got it. ADB worked, Fastboot didn't. Read online about someone on this forum getting it to work by using XZ2 driver from Sony as they evidently don't have a published driver for this device. The person who posted this solution had reported problems with this driver recently. I tried it anyway.... ADB commands work and my phone shows up when listing devices. Reboot into fastboot mode and the only thing my phone does is show a blue light indicator... no splash screen or logo. To me this means it's starting fastboot but my driver isn't working with it to recognize it as any commands for fastboot return nothing or fail. It doesn't show up under fastboot devices command.
Does anyone have a clue as to what to do?
Click to expand...
Click to collapse
I have the exact same problem, have not managed to find a solution trying with 3(!) different laptops and 2 different cables. No idea what could go wrong. I checked the device and it says that unlocking is okay. Really frustrating.
Edit: I actually found a way! Once you manage to enter the fastboot mode (light is permanently blue) go to the device manager in windows, click on the unknown android device, and install custom drivers (either by selecting from the list or by picking the universal adb driers from a local folder). These custom drivers should be adb drivers. Once they are installed, fastboot should work.

I had the same problems with my device XA2 H3113 and Win10.
My solution: Try it with Ubuntu. Just grab an 8GB usbstick, install Ubuntu via usb-installer, boot ubuntu and open a terminal
sudo apt update
sudo apt install adb fastboot

LolRoll said:
I have the exact same problem, have not managed to find a solution trying with 3(!) different laptops and 2 different cables. No idea what could go wrong. I checked the device and it says that unlocking is okay. Really frustrating.
Edit: I actually found a way! Once you manage to enter the fastboot mode (light is permanently blue) go to the device manager in windows, click on the unknown android device, and install custom drivers (either by selecting from the list or by picking the universal adb driers from a local folder). These custom drivers should be adb drivers. Once they are installed, fastboot should work.
Click to expand...
Click to collapse
Hey can you please provide me a link to the drivers? as I've been trying so many drivers and they don't work.

LolRoll said:
I have the exact same problem, have not managed to find a solution trying with 3(!) different laptops and 2 different cables. No idea what could go wrong. I checked the device and it says that unlocking is okay. Really frustrating.
Edit: I actually found a way! Once you manage to enter the fastboot mode (light is permanently blue) go to the device manager in windows, click on the unknown android device, and install custom drivers (either by selecting from the list or by picking the universal adb driers from a local folder). These custom drivers should be adb drivers. Once they are installed, fastboot should work.
Click to expand...
Click to collapse
works for me

[HELP] MI a2 lite Fastboot Exits aAutomatically

I have a mi a2 lite and i want to unlock its bootloader, i have alrready enabled oem unlocking on developer options, when i boot my device in fastboot and connect to computer, command window says waiting for device and after 15-20 seconds of connecting my device to my pc, fastboot mode automatically exits and shows charging animation. Please anyone can help?
My device is in andoid pie (stable).

Check if you have installed drivers and run "fastboot devices" to see if device is recognised.

Agree something with your PC.
Phone will automatically exit fastboot if no connection in timely manner.
Check drivers are installed, reboot your PC.
Also be sure USB debugging is on in Dev option and trust PC.
For me, I generally boot Android normal. Then plug into PC and from command line, "adb reboot bootloader". That should verify adb, If that doesn't work, your PC not talking to device.

hossman said:
Agree something with your PC.
Phone will automatically exit fastboot if no connection in timely manner.
Check drivers are installed, reboot your PC.
Also be sure USB debugging is on in Dev option and trust PC.
For me, I generally boot Android normal. Then plug into PC and from command line, "adb reboot bootloader". That should verify adb, If that doesn't work, your PC not talking to device.
Click to expand...
Click to collapse
I reinstalled the drivers and the command "adb reboot bootloader" works for me that means it boots to fastboot mode but when in fastboot mode, when i enter a command "fastboot devices" it does nothing and when i enter command "fastboot oem unlock" it again says waiting for any device.
i have attached a screenshot of it.

I've tried restarting my pc as well as my phone and after 5-6 attempts it is now unlocked.
Thanks guys for supporting and giving response to my post
Love ya'll

CherryFarmer8 said:
I reinstalled the drivers and the command "adb reboot bootloader" works for me that means it boots to fastboot mode but when in fastboot mode, when i enter a command "fastboot devices" it does nothing and when i enter command "fastboot oem unlock" it again says waiting for any device.
i have attached a screenshot of it.
Click to expand...
Click to collapse
same problem boss, did you already solved this? please help me out

Andrew.kathy said:
same problem boss, did you already solved this? please help me out
Click to expand...
Click to collapse
The solution for fastboot disconnecting after a few seconds are the windows drivers. There are different drivers for our phone, normal, bootloader and fastboot. Windows loads these drivers depending in which state the phone is.
If you still didn't find the correct drivers, you should try installing MiFlash, as it contains all the needed drivers for our phone
If you like to try the Linux way, there's a distro called FWUL linux here on XDA

capajga said:
The solution for fastboot disconnecting after a few seconds are the windows drivers. There are different drivers for our phone, normal, bootloader and fastboot. Windows loads these drivers depending in which state the phone is.
If you still didn't find the correct drivers, you should try installing MiFlash, as it contains all the needed drivers for our phone
If you like to try the Linux way, there's a distro called FWUL linux here on XDA
Click to expand...
Click to collapse
Yeah, just go to windows drivers, click update device driver, browse my computer, let me pick, choose android > next > and choose another version or try whatever you feel is appropriate

CherryFarmer8 said:
Yeah, just go to windows drivers, click update device driver, browse my computer, let me pick, choose android > next > and choose another version or try whatever you feel is appropriate
Click to expand...
Click to collapse
I also have this problem drivers are installed and fine but when I go to fastboot within like 15 sec it automatically turns off.

I fixed it with this https://forum.xda-developers.com/attachments/howto_driver-zip.2480396/