Managed to trigger it with a lock debugging kernel, attached is output of blocked tasks and locks held when it happens.
** Attachment added: "locks.txt" http://launchpadlibrarian.net/47665797/locks.txt -- [arrandale] deadlock in i915_gem_madvise_ioctl https://bugs.launchpad.net/bugs/568138 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ 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