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. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1116587 Title: Lenovo T400: With external monitor the system is rarely working for more than 10 minutes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1116587/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
