https://bugzilla.kernel.org/show_bug.cgi?id=198669
--- Comment #5 from roger@beardandsandals.co.uk (roger@beardandsandals.co.uk) --- My best guess is the error came from
r600.c:2848: DRM_ERROR("radeon: ring %d test failed (scratch(0x%04X)=0x%08X)\n",
I cannot reproduce the mechanical hardware failure. I don't want to clobber the system any harder and risk damaging a disk.
I assume this is being called from the GPU reset path.