Could you provide the Xorg log from the hanging session? It should be Xorg.0.log.old after you've rebooted. Although it's possible that the system is unable to log anything at that point..
try a mainline kernel snapshot as well: http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel- nightly/2013-01-24-raring/ ** Changed in: xserver-xorg-video-intel (Ubuntu) Importance: Undecided => High ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Confirmed => Incomplete ** Changed in: xserver-xorg-video-intel (Ubuntu) Assignee: (unassigned) => Timo Aaltonen (tjaalton) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1103680 Title: [sna] Hard hang when logging in To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1103680/+subscriptions _______________________________________________ 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
