(In reply to comment #134)
> I'd like to test disabling UVD. I'll dig in the kernel to report UVD as
> disabled for SI for this test. This should narrow where we have to look for
> this bug.

Sometimes UVD functions are needed for power management to work correctly, so
not enabling UVD at all might not be an option either. But I'm not sure if that
applies to your hardware or not.

Easiest way to disable UVD otherwise is to just add an "return -1" to the
beginning of radeon_uvd_init in the kernel module.