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.
One thing you can try is building the driver from git with debugging enabled:
$ apt-get build-dep xserver- xorg-video- intel freedesktop. org/xorg/ driver/ xf86-video- intel default- accel=sna --enable-debug
$ git clone git://anongit.
$ cd xf86-video-intel
$ ./autogen.sh --prefix=/usr --with-
$ 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.