Public bug reported: This is a very weird bug that started occurring since I updated to 21.04. I am not sure mutter is the correct package. I have a bluetooth mouse that works perfectly (I'll clarify below why I'm sure it works). Sometimes, seemingly at random, scrolling stops working correctly, but not always in all applications (eg. scroll starts failing in Firefox, but works fine in Terminal). When this happens, moving the mouse around over a window causes it to scroll randomly up and down, while moving the mouse wheel also works randomly (sometimes it scrolls in the correct direction, sometimes in the opposite direction, sometimes not at all). This occurs only when I have my external monitor connected (dual, non mirrored displays). If I unplug the display, the problem disappears immediately. If I plug the display back in, that problem reappears immediately (if it was already occurring before). While the problem is "active", I can scroll without problem using the notebook's touchpad. It seems to affect only the mouse. I've seen messages like this in the log, but it does not seem strongly correlated with the occurrence of the problem: libinput error: event21 - MX Anywhere 2S Mouse: client bug: event processing lagging behind by 21ms, your system is too slow Also, rebooting the computer fixes the issue for a few hours/days, until it appears again. Also, the problem sometimes "solves itself" after a few minutes, or it intermittenly appears every few minutes.
ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: mutter 3.38.4-1ubuntu2 ProcVersionSignature: Ubuntu 5.11.0-18.19-generic 5.11.17 Uname: Linux 5.11.0-18-generic x86_64 ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: GNOME Date: Thu Jun 17 13:58:15 2021 InstallationDate: Installed on 2018-12-14 (916 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) SourcePackage: mutter UpgradeStatus: Upgraded to hirsute on 2021-05-30 (17 days ago) ** Affects: mutter (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug hirsute wayland-session -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1932357 Title: Mouse wheel not interpreted correctly when using external display Status in mutter package in Ubuntu: New Bug description: This is a very weird bug that started occurring since I updated to 21.04. I am not sure mutter is the correct package. I have a bluetooth mouse that works perfectly (I'll clarify below why I'm sure it works). Sometimes, seemingly at random, scrolling stops working correctly, but not always in all applications (eg. scroll starts failing in Firefox, but works fine in Terminal). When this happens, moving the mouse around over a window causes it to scroll randomly up and down, while moving the mouse wheel also works randomly (sometimes it scrolls in the correct direction, sometimes in the opposite direction, sometimes not at all). This occurs only when I have my external monitor connected (dual, non mirrored displays). If I unplug the display, the problem disappears immediately. If I plug the display back in, that problem reappears immediately (if it was already occurring before). While the problem is "active", I can scroll without problem using the notebook's touchpad. It seems to affect only the mouse. I've seen messages like this in the log, but it does not seem strongly correlated with the occurrence of the problem: libinput error: event21 - MX Anywhere 2S Mouse: client bug: event processing lagging behind by 21ms, your system is too slow Also, rebooting the computer fixes the issue for a few hours/days, until it appears again. Also, the problem sometimes "solves itself" after a few minutes, or it intermittenly appears every few minutes. ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: mutter 3.38.4-1ubuntu2 ProcVersionSignature: Ubuntu 5.11.0-18.19-generic 5.11.17 Uname: Linux 5.11.0-18-generic x86_64 ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: GNOME Date: Thu Jun 17 13:58:15 2021 InstallationDate: Installed on 2018-12-14 (916 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) SourcePackage: mutter UpgradeStatus: Upgraded to hirsute on 2021-05-30 (17 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1932357/+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