I recently realized my sys-usb qube, running Debian, was still using Qubes 4.1 tooling due to a misconfiguration of apt sources (fresh install with 4.1 backup).
After upgrading to 4.2 my keyboard (Thinkpad compact bluetooth keyboard with trackpoint) is no longer recognized as keyboard but as “input.tablet” which makes only the trackpoint work.
For the time being I reverted to using Qubes 4.1 tooling but, given 4.3 is soon to be released I was hoping there was a better solution to address this.