Created attachment 117062 [details] /sys/class/drm/card0/error When resizing the glxgears window (making it bigger, past ~ 450x450), the render output begins to be corrupted. A second copy of the gears might be seen offset to the right, flickering; garbage might be displayed in the bottom part of the windows, etc. Something, even the window borders are overwritten, or even a part of the screen outside the window. When I maximized the glxgears window, X completely crash. dmesg showed a GPU hang, with the request to submit a bug here. Moreover, mplayer -vo gl (and -vo gl2) shows black moving spots in the video output. Those don't appear with, say, -vo sdl. Those black spots is what lead me to run glxgears in the first place. I'm running Arch GNU/Linux, and updated this system today, after not using it for about a month. While I'm not absolutely certain these issues weren't there the last time I used it, I am very certain they weren't there half a year ago. This system is now running a 4.0.7 kernel and Xorg 1.15.2. pacman says xf86-video-intel is at version 1:2.99.917+364+gb24e758-1 and mesa at 10.6.1-1. The window manager I use is Enlightenment DR16. This is an old Dell XPS M1330 laptop with an Intel Mobile GM965/GL960 (according to lspci). I'm attaching the GPU crash dump.
commit e5c6e48cc9e11f659d0d9d1b907357e28a554e9f Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Sun Jun 28 18:25:37 2015 +0100 sna/dri2: Discard backbuffer cache on Window resize
*** This bug has been marked as a duplicate of bug 91036 ***
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