Triaged. This tearing with multiple monitors is a known consequence of the Xorg modesetting driver.
The upstream bug is https://gitlab.freedesktop.org/xorg/xserver/issues/244 (shared with bug 1846398, which needs a similar fix). ** Summary changed: - Screen tearing in xorg gnome session on Latitude 7480 with WD19TB Thunderbolt dock + [modeset] Screen tearing when using multiple monitors ** Changed in: xorg-server (Ubuntu) Status: Incomplete => New ** Tags removed: xrandr-scaling ** Tags added: multimonitor ** Bug watch added: gitlab.freedesktop.org/xorg/xserver/issues #244 https://gitlab.freedesktop.org/xorg/xserver/issues/244 ** Also affects: xorg-server via https://gitlab.freedesktop.org/xorg/xserver/issues/244 Importance: Unknown Status: Unknown ** Changed in: xorg-server (Ubuntu) Importance: Undecided => Medium ** Changed in: xorg-server (Ubuntu) Status: New => Triaged ** Tags added: tearing -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1853094 Title: [modeset] Screen tearing when using multiple monitors Status in X.Org X server: Unknown Status in xorg-server package in Ubuntu: Triaged Bug description: I have the WD19TB Thunderbolt dock connected to a Dell Latitude 7480 laptop with two external displays. The laptop itself is closed (internal display is not used). In a gnome xorg session, there is severe tearing on parts of the screen when dragging windows or scrolling content. Under a wayland session there is no screen tearing, but I have keyboard key repetition problems which make this mostly unusable day- to-day (https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1849405). I can supply short phone videos of tearing occurring on the screens if required. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: mutter 3.28.4-0ubuntu18.04.2 ProcVersionSignature: Ubuntu 5.0.0-36.39~18.04.1-generic 5.0.21 Uname: Linux 5.0.0-36-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.9 Architecture: amd64 CurrentDesktop: GNOME Date: Tue Nov 19 14:02:09 2019 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_AU.UTF-8 SHELL=/bin/bash SourcePackage: mutter UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/xorg-server/+bug/1853094/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
