Comment # 4 on bug 71983 from Arek Ruśniak

yep:) 
if i good understand word "bisect" here it is:

http://cgit.freedesktop.org/mesa/drm/commit/?id=ce8af454259279c14c44bcd32c429640ca5e1691

btw i try turn off tiling but without succes, gpu still crashes. Before this
commit it works ok.