https://bugzilla.kernel.org/show_bug.cgi?id=44121
--- Comment #1 from Alex Deucher alexdeucher@gmail.com 2012-07-03 14:53:04 --- Can you dump the following registers using radeonreg or avivotool (http://cgit.freedesktop.org/~airlied/radeontool/) with the patch applied and reverted and attach both results?
CC_RB_BACKEND_DISABLE (0x98F4) CC_SYS_RB_BACKEND_DISABLE (0x3F88) GC_USER_RB_BACKEND_DISABLE (0x9B7C) CC_GC_SHADER_PIPE_CONFIG (0x8950) GB_BACKEND_MAP (0x98FC)
(as root): radeonreg regmatch 0x98F4 etc.