I have a similar problem with "Intel Corporation Integrated Graphics Controller". In my case after rotation the screen is not resized and xsevers lock up. Commenting "Virtual 1600 1200" in my xorg.conf DIDN'T solve the problem.
-- xorg lockup when screen is rotated https://bugs.launchpad.net/bugs/174745 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