https://bugs.freedesktop.org/show_bug.cgi?id=75719
--- Comment #9 from smoki smoki00790@gmail.com --- (In reply to comment #8)
could you change all occurencies of VM_PFNMAP in ttm_bo_mmap() (ttm_bo_vm.c) to VM_MIXEDMAP and check if that fixes the problem you are seeing?
Quick try and yes that helps :). Seems like r200 like VM_MIXEDMAP, but not VM_PFNMAP.