https://bugs.freedesktop.org/show_bug.cgi?id=60879
--- Comment #11 from Hristo Venev mustrumr97@gmail.com --- It's the same as starting weston. egltri_screen doesn't hang the GPU. Only Xorg does. egltri_screen and weston fail to clear the buffer or render anything. With current llvm svn, mesa git, libdrm git and linux 3.8.2 the problem is still there.