The monitor that flickers is the built-in LCD display of the laptop (HP Elitebook 2730p).
I booted 12.04 B1 with nomodeset boot option and there was no flickering (but otherwise wrong display resolution). I reverted to 11.10, and the flickering stopped. I will install 12.04 B1 from scratch, instead of upgrading, to see if the problem re-appears -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/945006 Title: Screen flickers heavily after upgrading to 12.04 beta 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/945006/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
