[Bug 286512] linuxkpi: amdgpu regressed after base 325aa4dbd10d

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286512

--- Comment #13 from [email protected] ---
Using drm-66-kmod's amdgpu, I'm unable to run X after 325aa4dbd10d.

The X server simply exits with

[    60.098] (EE) modeset(0): failed to set mode: No such file or directory
[   115.161] (EE) 
Fatal server error:
[   115.161] (EE) Caught signal 6 (Abort trap). Server aborting

The kernel produces some noise:

May  2 23:25:34 hemlock kernel: [drm ERROR :amdgpu_job_timedout] ring gfx_0.0.0
timeout, signaled seq=4, emitted seq=6
May  2 23:25:34 hemlock kernel: [drm ERROR :amdgpu_job_timedout] Process
information: process  pid 101244 thread  pid 101244
May  2 23:25:34 hemlock kernel: drmn0: GPU reset begin!
May  2 23:25:35 hemlock kernel: drmn0: BACO reset
May  2 23:25:38 hemlock kernel: drmn0: GPU reset succeeded, trying to resume
May  2 23:25:38 hemlock kernel: [drm] PCIE GART of 512M enabled (table at
0x0000008000300000).
May  2 23:25:38 hemlock kernel: [drm] VRAM is lost due to GPU reset!

And quite a bit more, which I can attach upon request.

amdgpu has been built from post-325aa4dbd10d sources.  This is on a GENERIC
kernel.

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