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October 17, 2020

Unable to list connected devices.

I'm new to VR development and I have no idea how to setup up the oculus quest 2. I was following a tutorial and I got stuck with these errors. any advice on how to set up unity would be great thanks
ERROR 
Unable to list connected devices. 
ADB server version (41) doesn't match this client (40); killing...
ADB server didn't ACK
Full server startup log: /var/folders/6v/96mw9lwd17n1zgr7lmfrs_wh0000gn/T//adb.501.log
 server had PID: 81364

3 replies

New Participant
October 22, 2020
That's a common error. I wouldn't be too concerned with it.
As for the connection issue, assuming you have a legit cable, you may need to reboot ADB...
In a command shell:
  • adb kill-server
  • adb start-server
  • adb devices
That should list your device.
December 14, 2021

I had the same problem, just noticed that ADBs from Unity and Oculus link are in conflict if run together. For me, just quitting the two applications and running just the Unity instance worked immediately

New Participant
January 13, 2022

Anonymous: Same here, had the issue. For me, I was able to resolve this by quitting Oculus Hub and Unity only. It worked for me.