Thanks for the testing result, there is a known deadlock in the upstream kernel that I guess I should be fixing... As the default is for fbc=0 on released kernels, enabling it is at your own risk - ergo not a bug in Ubuntu per se.
** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Confirmed => Invalid -- 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/1178706 Title: System freeze after DPMS off with external monitors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1178706/+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