I found this bug report with a patch that is supposed to solve the problem. I haven't had time to test it myself yet.
https://bugs.freedesktop.org/show_bug.cgi?id=10809 /Björn -- laptop hangs when switching video mode https://bugs.launchpad.net/bugs/127101 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs