Comment # 43
on bug 91278
from Christian König
(In reply to Alex Deucher from comment #42) > (In reply to Mathias Tillman from comment #41) > > Just tried it again with the latest drm-next-4.4 and the kernel parameters > > amdgpu.enable_scheduler=0 amdgpu.vm_debug=1 amdgpu.enable_semaphores=1. > > I don't think forcing semaphores will work on tonga/fiji since there were > disabled in the code a while ago due to hw bugs. Yeah, forcefully enabling semaphores on Tonga will crash rather fast. The purpose of vm_debug != 0 is to stop after the first VM fault. So if you got a VM fault from time to time which was just ignored than setting vm_debug will certainly crash the system. On the other hand you shouldn't get VM faults in the first place.
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