https://bugs.freedesktop.org/show_bug.cgi?id=79980
--- Comment #100 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #99)
I am not sure if this is related, but what I see _a lot_ recently in my kernel log is this:
[ 554.747835] [TTM] Illegal buffer object size [ 554.747837] [TTM] Illegal buffer object size [ 554.747838] [drm:radeon_gem_object_create] *ERROR* Failed to allocate GEM object (0, 6, 4096, -22)
Unrelated. You are seeing bug 82162 which is already fixed.