Thank you very much for your suggestion #21, Traumflug. I read the issue you quoted and to be honest, I was quite disappointed in the responses so far.
The symptoms sound very similar to those I reported here. I compared the wayland packages on my desktop (slow or lost mouse and keyboard events) with those on my laptop (ubuntu studio), which works satisfactorily. I will attach a file containing the two dpkg lists for comparison. I really don't understand the wayland architecture, but was happy to use the recommended workaround when running sudo gui programs such as gparted. I notice two differences and wonder whether either of them might account for the diference between my two systems? 1. The desktop has three i386 old packages not installed on the laptop. Perhaps I should delete them? 2. The desktop has the xwayland package installed, but the laptop does not. What do you think? Is this helpful in tracking down the root cause of the problem? Is there anything I can do to assist with further diagnosis, given I have two systems side-by-side for comparison? ** Attachment added: "dpkg list comparison for wayland" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1838919/+attachment/5282468/+files/2019-08-14-wayland-packages-compared -- 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/1838919 Title: Slow and lost keyboard and mouse events Status in gnome-shell package in Ubuntu: New Status in mutter package in Ubuntu: New Bug description: This was a fresh amd64 installation with 18.10 desktop, upgraded to 19.04 as soon as available. It has been getting worse over the last few weeks and is now so bad I can hardly type an email (or this bug report!) without having to fix many typos. journalctl shows many different gnome errors, so it is difficult to figure out which is the underlying cause and which are simply collateral damage. There are two sequences that appear first after a reboot, and the first of these has been reported many times on ubuntu releases going back for years:- Aug 05 08:16:08 schizo org.gnome.Shell.desktop[3529]: # GTK+ module /usr/lib/x86_64-linux-gnu/gtk-2.0/modules/libcanberra-gtk-module.so cannot be loaded. Aug 05 08:16:08 schizo org.gnome.Shell.desktop[3529]: # GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported. Aug 05 08:16:08 schizo org.gnome.Shell.desktop[3529]: # Failed to load module "canberra-gtk-module" .... and .... Aug 05 09:11:04 schizo gnome-shell[3529]: [AppIndicatorSupport-DEBUG] Registering StatusNotifierItem :1.89/org/ayatana/NotificationItem/software_update_available Aug 05 09:11:04 schizo gnome-shell[3529]: [AppIndicatorSupport-FATAL] unable to update overlay icon Aug 05 09:11:04 schizo gnome-shell[3529]: [AppIndicatorSupport-FATAL] unable to update overlay icon Aug 05 09:11:05 schizo org.gnome.Shell.desktop[3529]: Window manager warning: Overwriting existing binding of keysym 33 with keysym 33 (keycode c). Aug 05 09:11:05 schizo org.gnome.Shell.desktop[3529]: Window manager warning: Overwriting existing binding of keysym 31 with keysym 31 (keycode a). Aug 05 09:11:05 schizo org.gnome.Shell.desktop[3529]: Window manager warning: Overwriting existing binding of keysym 32 with keysym 32 (keycode b). Aug 05 09:11:05 schizo org.gnome.Shell.desktop[3529]: Window manager warning: Overwriting existing binding of keysym 34 with keysym 34 (keycode d). Aug 05 09:11:05 schizo org.gnome.Shell.desktop[3529]: Window manager warning: Overwriting existing binding of keysym 35 with keysym 35 (keycode e). Aug 05 09:11:05 schizo org.gnome.Shell.desktop[3529]: Window manager warning: Overwriting existing binding of keysym 39 with keysym 39 (keycode 12). Aug 05 09:11:05 schizo org.gnome.Shell.desktop[3529]: Window manager warning: Overwriting existing binding of keysym 36 with keysym 36 (keycode f). Aug 05 09:11:05 schizo org.gnome.Shell.desktop[3529]: Window manager warning: Overwriting existing binding of keysym 37 with keysym 37 (keycode 10). Aug 05 09:11:05 schizo org.gnome.Shell.desktop[3529]: Window manager warning: Overwriting existing binding of keysym 38 with keysym 38 (keycode 11). Aug 05 09:12:19 schizo org.gnome.Shell.desktop[3529]: [4042:4042:0805/091219.948098:ERROR:buffer_manager.cc(488)] [.DisplayCompositor]GL ERROR :GL_INVALID_OPERATION : glBufferData: <- error from previous GL command Aug 05 09:12:21 schizo org.gnome.Shell.desktop[3529]: [4042:4042:0805/091221.376983:ERROR:buffer_manager.cc(488)] [.DisplayCompositor]GL ERROR :GL_INVALID_OPERATION : glBufferData: <- error from previous GL command Aug 05 09:12:22 schizo org.gnome.Shell.desktop[3529]: [4042:4042:0805/091222.542169:ERROR:buffer_manager.cc(488)] [.DisplayCompositor]GL ERROR :GL_INVALID_OPERATION : glBufferData: <- Is this a recent regression? I know for sure the system wasn't this unresponsive 3 weeks ago, but I cannot be sure when it started to go wrong. My mouse/keyboard combo has a USB-wireless dongle and I've fiddled around with distance and battery state until I was sure the problem was somewhere else and started to check the system log. ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: gnome-software 3.30.6-2ubuntu4.19.04.1 ProcVersionSignature: Ubuntu 5.0.0-23.24-generic 5.0.15 Uname: Linux 5.0.0-23-generic x86_64 ApportVersion: 2.20.10-0ubuntu27.1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Mon Aug 5 11:53:37 2019 InstalledPlugins: gnome-software-plugin-flatpak 3.30.6-2ubuntu4.19.04.1 gnome-software-plugin-snap 3.30.6-2ubuntu4.19.04.1 SourcePackage: gnome-software UpgradeStatus: Upgraded to disco on 2019-04-28 (98 days ago) --- ProblemType: Bug ApportVersion: 2.20.10-0ubuntu27.1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME DisplayManager: gdm3 DistroRelease: Ubuntu 19.04 Package: mutter PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.0.0-23.24-generic 5.0.15 RelatedPackageVersions: mutter-common 3.32.2+git20190711-2ubuntu1~19.04.1 Tags: disco Uname: Linux 5.0.0-23-generic x86_64 UpgradeStatus: Upgraded to disco on 2019-04-28 (99 days ago) UserGroups: adm audio cdrom dip disk floppy lp lpadmin plugdev sambashare scans sudo video wireshark _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1838919/+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
