https://bugs.freedesktop.org/show_bug.cgi?id=60879
--- Comment #12 from Michel Dänzer michel@daenzer.net --- (In reply to comment #11)
egltri_screen doesn't hang the GPU. Only Xorg does. egltri_screen and weston fail to clear the buffer or render anything.
Because the GPU hangs trying to render anything. :) The kernel output is from resetting the hung GPU.