Some bisecting jobs are done, it seems the following commit fixed the external mode issue.
commit 47a05eca72991039e788b25232061f9c9df9ec23 Author: Jesse Barnes <[email protected]> Date: Mon Feb 7 13:46:40 2011 -0800 drm/i915: disable PCH ports if needed when disabling a CRTC Disable any PCH ports associated with a pipe when disabling it. This should prevent transcoder disable failures due to ports still being on. Signed-off-by: Jesse Barnes <[email protected]> [ickle: introduce *_PIPE_ENABLED() macro] Signed-off-by: Chris Wilson <[email protected]> I put the kernel packages at http://people.canonical.com/~lexical/bugs/lp791752/ for anyone to test. -- 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/791752 Title: Can not toggle Display to External only mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/791752/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
