Happens to me also, and I can reproduce it if I connect a second monitor. First monitor turns off and the second turns on.
If I enable the second monitor from system settings, X crashes every tie. Bugreport: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1541932 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1492764 Title: [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1492764/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
