It sounds like touches are being scaled to stage coordinates instead of view coordinates. So a touch halfway across the touch screen gets mapped to a desktop location halfway across all monitors. Just a guess.
** No longer affects: gnome-shell-extension-desktop-icons (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1821933 Title: Touch input is offset with two screens (even appearing on the wrong screen) Status in gnome-shell package in Ubuntu: New Bug description: Using touch input with one screen seems fine. However, when connecting a second screen the touch event happens at the wrong coordinates. Steps to reproduce 1. Starting with a single screen touch and hold on the background and drag. The rubber band selector shows up with the moving corner at your finger. 2. Connect a second screen 3. Do the same touch and drag as in step 1 and notice that the moving corner is offset to the right and slightly below where the touch is happening. --- ProblemType: Bug ApportVersion: 2.20.10-0ubuntu23 Architecture: amd64 CurrentDesktop: ubuntu:GNOME DisplayManager: gdm3 DistroRelease: Ubuntu 19.04 GsettingsChanges: b'org.gnome.desktop.interface' b'gtk-im-module' b"'ibus'" InstallationDate: Installed on 2019-03-28 (0 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190326.2) Package: gnome-shell 3.32.0-1ubuntu1 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.0.0-7.8-generic 5.0.0 Tags: disco Uname: Linux 5.0.0-7-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1821933/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
