This is the output of xrandr -q --verbose from a repeat of test 2 (where the laptop display is not detected at all, but no freeze occurs).
** Attachment added: "xrandr.txt" http://launchpadlibrarian.net/51271758/xrandr.txt -- [arrandale] X freezes after plugging in external monitor and selecting System>Preferences>Monitors https://bugs.launchpad.net/bugs/599626 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