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 Bugs, which is subscribed to 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 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs