Found it, and I closed it because the screen flickering is gone: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2018448
But the "Atomic update" error was there, on pipe A if that makes any difference. I see it on A/B/C, very much like https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1806242 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/2033433 Title: Xorg 100% CPU and frozen desktop after closing chromium To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/2033433/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
