"Unrecognized device identity" message after suspend

[marmarek]

How to file a helpful issue

Qubes OS release

R4.3

Brief summary

After suspend, journalctl in dom0 contains a line like this:

Jan 07 06:18:52.158635 dom0 widget-wrapper[4685]: Unrecognized device identity '1d6b:0104::u030101u030000' expected '1d6b:0104:unknown:u030101u030000'

or

Jan 07 07:06:22.321887 dom0 widget-wrapper[5138]: Unrecognized device identity '1d6b:0104:unknown:u030101u030000' expected '1d6b:0104:0123456789abcdef:u030101u030000'

The device in question is USB keyboard/mouse emulated in openQA tests.

Steps to reproduce

1. Connect USB keyboard/mouse (here emulated via USB gadget on RPi, see https://github.com/QubesOS/tests-hw-setup/blob/main/states/openqa-cmds/gadget-control)
2. Suspend the system
3. Observe journalctl after resume

Expected behavior

No error

Actual behavior

A message about unrecognized device identity. The device was not assigned/attached to any qube before suspend.

More can be found at https://openqa.qubes-os.org/tests/overview?distri=qubesos&version=4.3&build=202501070327-4.3&groupid=12 (see suspend tests)

[marmarek]

Based on the message, looks like reading the serial number sometimes fails, in different ways. The device is supposed to have 0123456789abcdef serial. Maybe a race condition in device identity reporting (tries to access the device before it's fully discovered by the kernel)?

But also, it's unclear to me what triggers this message in the first place. There should be no assignment for this device, so I don't know what mismatches with what...