Unable to use ADB on Oneplus 3t

Shearflux · 6 Mar 2021, 18:45

Hi, I've been trying to troubleshoot this issue but have not been able to figure it out. On my Oneplus 3t, I enabled developer mode, and confirmed on the phone with

ls /usr/bin/ | grep adbd

that the daemon exists. Adb is also installed on my laptop, but it cannot find my device. When I use:

sudo adb devices

It doesn't list any device. I am able to transfer files over MTP and am also able to SSH into the phone. Is there a hardware ID or something missing that prevents ADB from recognizing my device? I don't get any pop-up on the phone for me to hit "allow" with.

Keneda · 3 Jun 2021, 19:02

@shearflux
Same when trying access adb when booting phone on recovery after enabling dev mode on?

Shearflux · 6 Mar 2021, 18:53

@keneda Awesome, so in recovery mode it shows up as:

List of devices attached
57489492	unauthorized

Which is nice to see. How do I get it authorized?

Keneda · 3 Jun 2021, 18:58

@shearflux
Does your device is locked by pin code when you shut screen off, then on back?

Shearflux · 6 Mar 2021, 19:01

@keneda Yes it has a pin, I attempt to use adb after unlocking my phone

Lakotaubp · 6 Mar 2021, 19:04

ADB only works in recovery. MTP should work iirc or use ssh https://docs.ubports.com/en/latest/search.html?q=ssh&check_keywords=yes&area=default

Keneda · 6 Mar 2021, 19:09

BTW i forgot to ask, why/what for do you need adb access?

Shearflux · 6 Mar 2021, 19:12

@keneda It provides quicker shell access than SSH since it doesn't rely on the local network's strength. SSH appears to have a little lag

Keneda · 3 Jun 2021, 19:20

@shearflux
OK, i understand. I don't know why your device is unauthorized, your phone has a pin, dev enabled and in recovery (and for sure i assume bootloader is unlocked), PC adb drivers and terminal installed, that should work (use USB2 not 3, and good data usb cable).

Keneda · 3 Jun 2021, 19:25

You can check with UT Tweak Tools from open store, in "system" setting tab, "usb settings" "ADB parameter" to see if it is in MTP.

Shearflux · 6 Mar 2021, 19:28

@keneda I checked it is in MTP mode. I found someone from 2019 who was in a similar situation:
https://forums.ubports.com/topic/2866/cannot-use-adb-because-of-unauthorized-device-worked-around/16
I suppose I'll use SSH for now, but I really appreciate the help!

Keneda · 6 Mar 2021, 19:34

@shearflux
Maybe someone will know where the unothorized issue come from.
Sad i can't help you further.

Keneda · 3 Jun 2021, 19:42

@shearflux said in Unable to use ADB on Oneplus 3t:

List of devices attached
57489492 unauthorized

For the sake of help, i tried a last thing, i qwanted your problem, and got a ping, see :
https://honeywellaidc.force.com/supportppr/s/article/How-to-fix-adb-devices-shows-unauthorized-device

Possible solutions if "adb devices" shows a device as "unauthorized":
_
C:\Users\JohnDoo>adb devices
List of devices attached
17310D821D unauthorized
_

Disconnect USB between PC and device

Stop adb server by entering "adb kill-server" in command window

On device use "Revoke USB debugging authorizations" in "Developer Options"

On PC delete "adbkey" file in user directory, for example "C:\Users\JohnDoo.android"

Reconnect the device to the PC

Open a command window and enter "adb devices". Watch the device's screen for any Authorization message and allow the connection.

The device should now show as "device":
_
_
C:\Users\JohnDoo>adb devices
List of devices attached
17310D821D device
_
If the above does not help, re-installing adb and or USB drivers may help.

You can revoke USB debugging authorization with UTTT like you probably saw.

Now i must go to work, hoping you succeed ^^

AntiDroid · 6 Mar 2021, 20:39

I am not sure if the 3t has this same issue but the 6t does not have working ADB and you have to use ssh to manipulate the device folders. I can not help other than suggesting to look into it.

Lakotaubp · 6 Mar 2021, 21:31

ADB only works during the installing process that is the only time I have seen it work (this is the same on a few devices now). Other than that I can/have transferred files back and forth between phone and laptop via usb. I have tried ssh but get a syntax error and need to look into it further from my side.
You do have to keep switching Dev mode on after reboots and restarting but I mention that just in passing.

Shearflux · 7 Mar 2021, 17:27

@keneda Sorry for the delay, but I tried the instructions above to no avail . My feeling is that it's related to the authorization pop-up just for some reason not popping up.

Shearflux · 7 Mar 2021, 17:29

@lakotaubp ADB seems to be the method of choice during any tutorials on various things. I also had it working on my 3t in the past, i'm just not sure why its not working anymore