Note that tearing on all-but-one monitor in Xorg sessions is expected. It's an unfortunate feature of Xorg with DRI2. If you can convince the system to use DRI3 and TearFree then that avoids it. But that feature also doesn't exist for all graphics drivers.
Please run: lspci -k > lspcik.txt and attach 'lspcik.txt' as well as your $HOME/.local/share/xorg/Xorg.0.log ** Changed in: xorg-server (Ubuntu) Status: New => Incomplete -- 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/1853094 Title: Screen tearing in xorg gnome session on Latitude 7480 with WD19TB Thunderbolt dock To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1853094/+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