regarding comment #3 from Bryce, the monitors.xml is not an issue here; I've moved this aside and still been able to reproduce it, and I've reproduced this also with a completely clean guest account.
It is not specific to the mainline kernel; it's reproducible both with the raring kernel and with the other (Ubuntu) test kernels I was running. I'm attaching two files, xrandr-good.txt and xrandr-bad.txt, for xrandr --verbose output with and without corruption respectively. In the 'bad' case, the corruption appears on the HDMI output - but this is not always true; it may appear on one output or the other. I can't say I see anything that points to this being a gnome bug, as I can reproduce the problem when calling xrandr directly to set the mode ('xrandr --output LVDS1 --pos 1680x0'). ** Attachment added: "xrandr-bad.txt" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1155838/+attachment/3638502/+files/xrandr-bad.txt -- 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/1155838 Title: raring: corrupted display on LVDS when I disconnect my HDMI output To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1155838/+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