Comment 15 for bug 1116587

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Chris Wilson (ickle) wrote :

One thing you can try is building the driver from git with debugging enabled:

$ apt-get build-dep xserver-xorg-video-intel
$ git clone git://anongit.freedesktop.org/xorg/driver/xf86-video-intel
$ cd xf86-video-intel
$ ./autogen.sh --prefix=/usr --with-default-accel=sna --enable-debug
$ make && sudo make install

Restart X and you should have a line in your Xorg.log saying
"(II) intel(0): SNA compiled with assertions enabled"

See if that catches anything - if you get spontaneous restarts make sure to attach the gdm.log in order to report the failed assertions.