Comment # 33
on bug 62959
from Alex Deucher
(In reply to comment #32) > Attachment 77608 [details] fixes the lockups, which suggests the DRM driver > doesn't actually flush caches when it should. radeon_ring_vm_flush() doesn't actually flush caches per se, it writes the new VM page table base address, so presumably we are not handling last_flush properly somewhere which results in a stale VM page table pointer.
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