On Tue, Mar 04, 2014 at 09:35:01PM +0000, Edd Barrett wrote: > Come to think of it, I think I *did* have this issue with that Feb 13th snap. > > This would fall in line with stsp's theory. I don't see any messages > from the kernel about disabling acceleration however.
Those messages are in /var/log/Xorg.0.log. They come from the xf86-video-intel driver, not from the kernel. src/uxa/intel_batchbuffer.c: "Failed to submit batch buffer, expect rendering corruption: %s.\n ", src/sna/kgem.c: "Failed to submit rendering commands, disabling acceleration.\n");
