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Question Fastboot drivers not working

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cass89

Member
Jan 17, 2013
29
3
searching all over the internet on how get my computer to recognize my device in fastboot..
I already had universal adb drivers installed, along with android studio.. so adb worked out of the box. I tried to root, got to where I need to unlock the bootloader but no fastboot..
Tried reinstalling universal adb drivers, also tried a few other downloads from google with no luck on anything..
Searching the forums it seems like fastboot 'just works' for everyone else, so maybe something on my computer is messed up..idk
device manager just shows 'unknown android device'
my phone is oneplus 9 unlocked version, model LE2115

any help is appreciated
 

mattie_49

Senior Member
Feb 4, 2010
2,972
919
Seymour Tn
OnePlus 9
searching all over the internet on how get my computer to recognize my device in fastboot..
I already had universal adb drivers installed, along with android studio.. so adb worked out of the box. I tried to root, got to where I need to unlock the bootloader but no fastboot..
Tried reinstalling universal adb drivers, also tried a few other downloads from google with no luck on anything..
Searching the forums it seems like fastboot 'just works' for everyone else, so maybe something on my computer is messed up..idk
device manager just shows 'unknown android device'
my phone is oneplus 9 unlocked version, model LE2115

any help is appreciated
I had the same issue with my op9 unlocking bl.
Use these and open your command window from this . Makes a shortcut on your desktop. I did and unlocking bl worked perfectly.
 

mattie_49

Senior Member
Feb 4, 2010
2,972
919
Seymour Tn
OnePlus 9
searching all over the internet on how get my computer to recognize my device in fastboot..
I already had universal adb drivers installed, along with android studio.. so adb worked out of the box. I tried to root, got to where I need to unlock the bootloader but no fastboot..
Tried reinstalling universal adb drivers, also tried a few other downloads from google with no luck on anything..
Searching the forums it seems like fastboot 'just works' for everyone else, so maybe something on my computer is messed up..idk
device manager just shows 'unknown android device'
my phone is oneplus 9 unlocked version, model LE2115

any help is appreciated
Double post
 

cass89

Member
Jan 17, 2013
29
3
ok now I'm confused.. those drivers didn't work. following the root guide on here it says 'unlock the usual way''boot to bootloader''issue command 'fastboot flashing unlock''
so I decided to try rebooting to fastboot instead, which brought me to fastbootd
fastboot does recognize fastbootd, but the unlock command "flashing unlock" is unrecognized

So do I use bootloader or fastbootd to issue the unlock command?
if the latter, why would fastbootd not recognize the command?
the 'oem unlock' option is ticked on...
 

mattie_49

Senior Member
Feb 4, 2010
2,972
919
Seymour Tn
OnePlus 9
ok now I'm confused.. those drivers didn't work. following the root guide on here it says 'unlock the usual way''boot to bootloader''issue command 'fastboot flashing unlock''
so I decided to try rebooting to fastboot instead, which brought me to fastbootd
fastboot does recognize fastbootd, but the unlock command "flashing unlock" is unrecognized

So do I use bootloader or fastbootd to issue the unlock command?
if the latter, why would fastbootd not recognize the command?
the 'oem unlock' option is ticked on...
Make sure you enable oem unlocking in dev options first and reboot.Reboot to bootloader,issue command $fastboot flashing unlock..
 

mattie_49

Senior Member
Feb 4, 2010
2,972
919
Seymour Tn
OnePlus 9
ok now I'm confused.. those drivers didn't work. following the root guide on here it says 'unlock the usual way''boot to bootloader''issue command 'fastboot flashing unlock''
so I decided to try rebooting to fastboot instead, which brought me to fastbootd
fastboot does recognize fastbootd, but the unlock command "flashing unlock" is unrecognized

So do I use bootloader or fastbootd to issue the unlock command?
if the latter, why would fastbootd not recognize the command?
the 'oem unlock' option is ticked on...
Are you a carrier variant or global unlocked 9/9pro?
 

cass89

Member
Jan 17, 2013
29
3
OEM unlocking is enabled, reboot to bootloader, command 'fastboot devices' shows no devices
Still have unknown android device in device manager

It's a global unlocked 9
 

cass89

Member
Jan 17, 2013
29
3
Did you create a shortcut to those adb driver's when you installed; on desktop. And open cmd window in that spot. ?
I'm not sure what you mean by shortcut
I unzipped the file to my desktop, then tried installing driver through device manager, but no driver was found.. I then tried installing the driver with the "DPInst_x64.exe" file, but it says install failed with no other explanation

I tried just opening a command prompt in that folder, but with no driver installed, it still isn't recognized

Thanks for helping, I'm lost at this point lol
 

mattie_49

Senior Member
Feb 4, 2010
2,972
919
Seymour Tn
OnePlus 9
I'm not sure what you mean by shortcut
I unzipped the file to my desktop, then tried installing driver through device manager, but no driver was found.. I then tried installing the driver with the "DPInst_x64.exe" file, but it says install failed with no other explanation

I tried just opening a command prompt in that folder, but with no driver installed, it still isn't recognized

Thanks for helping, I'm lost at this point lol

Try one more thing. Install these and creat shortcut on desktop and try opening cmd in this. We gonna get you unlocked.
 

cass89

Member
Jan 17, 2013
29
3
tried that, still nothing. usb debugging is on.
all I need is a working driver, everything else should be good..
one thing which i'm not sure if it's an issue, I'm using an old usb c to usb 2 cable, I'm not using the cable that came with the phone because my computer doesn't have usb c ports.. but adb and mass storage/file transfers work with no issue
 

cass89

Member
Jan 17, 2013
29
3
2 new cords, and also tried multiple driver downloads, but still nothing... i was really hoping to root this phone and it seemed so easy for everyone else, thats why i bought it.. but I guess I'm stuck with a locked bootloader...
I could try factory resetting windows or the phone, but would that even make a difference?

..rereading the root guide, at the beginning it says "if you're on global and want root, flash the eu boot.img" but I'm not sure if he means do that first or use that for the guide.. I'm assuming I need the bootloader unlocked in order to flash it first, but maybe not..
..also should I have just commented in the root guide post, instead of making a new post?..
 
Last edited:

cass89

Member
Jan 17, 2013
29
3
Got it!! Someone posted about the op6 not working either and the fix is turning off windows driver signature, not sure why but that worked for me..
Thanks, now on to root lol
 

chinbags

Senior Member
Jul 13, 2010
116
27
New York
I just had some serious fastboot driver issues when setting up my oneplus. Not sure if this helps but can you at least find the driver folder that was installed on your c:drive when you initially installed the drivers. Then check your device manager when your phone is in fastboot and update the device (usually under portable devices) through that path?

If you get a tampering /corrupt error when you do this you can disable driver signing in windows which is what worked for me thanks to this saint.


Edit: you solved it while I was responding....I had the same issue..congrats...I know the feeling!