This bug, if it's the same, just happened to me in Raring. I connected an external monitor but when disconnecting it xorg just froze.
64 bit Ubuntu raring + Inte GMA 3150. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1066298 Title: Xorg server hangs when disconnecting external monitor Status in “xserver-xorg-video-intel” package in Ubuntu: Fix Released Bug description: Boot with two screens (internal laptop panel and external display) Using graphical monitor tool, disable external screen, xorg hangs. Alternatively if you pull the VGA cable out it doesn't shrink the screen view . ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: xserver-xorg-video-intel 2:2.17.0-1ubuntu4.1 ProcVersionSignature: Ubuntu 3.2.0-31.50-generic 3.2.28 Uname: Linux 3.2.0-31-generic x86_64 ApportVersion: 2.0.1-0ubuntu13 Architecture: amd64 Date: Sat Oct 13 14:33:48 2012 InstallationMedia: Kubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120820.1) ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, user) LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: xserver-xorg-video-intel UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1066298/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
