Same issue here on a Lenovo T450s with a Intel HD Graphics 5500 (Broadwell GT2) GPU. It happens both with Ubuntu 16.04 and Fedora (26 and 27) so I suppose that's a weird bug in the intel driver. It also happens sometimes without any external monitor when I leave my notebook powered up during the night: in the moring my gdm lock screen flickers and I'm unable to login into my session. Has someone found a workaround or a fix?
-- 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 [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
