Does this by any chance also affect stable? I just upgraded my packages which included a bump of the linux kernel from 6.6.13 to 6.6.14 and that build won’t boot:
Jan 31 14:42:41 nixos kernel: amdgpu 0000:c1:00.0: Direct firmware load for amdgpu/psp_13_0_4_toc.bin failed with error -2
Jan 31 14:42:41 nixos kernel: [drm:amdgpu_device_init [amdgpu]] *ERROR* early_init of IP block <psp> failed -19
...
Jan 31 14:42:41 nixos kernel: amdgpu 0000:c1:00.0: amdgpu: Fatal error during GPU init
As a result, xserver crashes with “no screens found” and ends up in a restart-loop.
Edit: False alarm, even downgrading to 6.6.13 didn’t fix that. Had to go back to the previous generation!