Christopher M Penalver: There is an AskUbuntu issue for my particular problem - something a lot like it - you can find it here: http://askubuntu.com/questions/765364/kubuntu-16-04-sddm-login-screen- hangs I've asked if they also saw the CPU underrun - no answer yet.
FWIW, I just installed xdiagnose and enabled all 3 debug check boxes, and it doesn't show any errors at the moment. I've worked around the "can't login" problem at the moment, and xdiagnose doesn't show any errors. Of course, if I hadn't worked around the "can't login" part, then I wouldn't have been able to launch xdiagnose to diagnose the X windows problem ;-). I will do as you suggested and create the additional bug report - and will link to it here and add you to the bug report. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [i915]] *ERROR* CPU pipe A FIFO underrun - Xorg glitches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
