Hi Lukas, this backtrace looks more like a GPU lockup (note all the "*Wait*" calls). GPUs are pretty common to Intel graphics.
For these kinds of issues, reproduce the freeze and collect the following: * /sys/kernel/debug/dri/0/i915_error_state * dmesg * File bug as ubuntu-bug xorg ** Changed in: xorg-server (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/768159 Title: X server randomly crashes (Segmentation fault at address 0x7f18a55c7010) _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp