Your system information

• Steam client version (build number or date): Package Version 1605919008, Built Nov 20 2020 21:55:57
• Distribution (e.g. Ubuntu): Devaun Beowulf (Debian Buster/Stable)
• Opted into Steam client beta?: Yes
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

At some point the controller input has stopped working on a previously working setup. The Steam Controller dongle and steam controllers are being recognized by the OS but not the client. Controller is recognized by the client when connected through a Steam Link device but controller input is not being sent to games. Controller has been tested with evtest and jstest with satisfactory results. Whether client is in Big Picture Mode (BPM) or not, it has no effect.

As a troubleshooting step the following have been made:

1. System reboot
2. System boot with prior kernel version (5.7.10)
3. evtest and jstest verification
4. Recovered firmware on controller -> resulted in unpairing and since the dongle is no longer identified can only pair on steam link.
5. Use old USB Gravis Gamepad -> detected by client as generic controller but no controller inputs are sent to any game

steam-devices is and has been installed

System Messages during USB dongle insert and system information:

https://gist.github.com/longshanks197/a3d4c2f8ee567e7b020be982bad4b0e8

Steps for reproducing this issue:

1. In BPM or Controller settings -> No Controllers Detected
2. Unplug and plug Dongle, No change
3. Power on controller, Has desktop functions -> No Controllers Detected
4. In game as a desktop configuration only

EDIT: fixed gist link