In response to the last comment... 1. Run this command: gsettings list-recursively org.gnome.shell > settings.txt
and attach the resulting text file here. See attached 2. Open a Terminal window and run 'top'. Now reproduce the problem again. While the problem is happening does 'top' report any process using very high CPU? All windows freeze. Only the cursor moves. "top" frozen. 3. Follow these instructions to check for crashes: https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment /var/crash is empty /var/lib/whoopsie/whoopsie-id ... https://errors.ubuntu.com/user/ID reports that "No errors have been reported from this system" Applied work around for bug 994921 and got same results (no crash) ### Additional Information ### 1. In addition to becoming un-responsive, window also freeze ("top" stops reporting while hung, Graphic applications like performance monitor also hang/freeze). 2. The "Settings" app shows a preview, when launched, it shows the current desktop. When selecting a different background, sometimes the preview will update (but freezes before updating the desktop), and sometimes the preview will not update. 3. After reboot, timing the hang, it takes about 16 minutes to become responsive again. However, a second settings change took as little as 90 seconds. Not enough evaluation has been done to determine if other factors are contributing to the timings (during the 90 second timing, I had tcpdump running and I pinged the machine from another machine during the hang). 4. After reboot, running tcpdump during the hang, viewing with wireshark after responsiveness returns, I find that there is some normal looking network traffice, including connectivity checks outbound and normal responses received. ### ** Attachment added: "settings.txt" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1885330/+attachment/5388157/+files/settings.txt -- 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/1885330 Title: System unresponsive to keyboard and mouse clicks when changing screen background Status in gnome-shell package in Ubuntu: Incomplete Bug description: Right click on screen background and choose settings. Then click a different background. System becomes unresponsive to keyboard input and mouse clicks. System returns to responsiveness after about 10 minutes. Description: Ubuntu 20.04 LTS Release: 20.04 CPU: 8-Core AMD Ryzen 7 1700 (-MT MCP-) speed: 2562 MHz Kernel: 5.4.0-37-generic x86_64 Up: 48m Mem: 2370.8/32114.5 MiB (7.4%) Storage: 1.82 TiB (5.5% used) Procs: 337 Shell: bash 5.0.16 inxi: 3.0.38 Expected behavior: Changing the background happens immediately and system remains responsive to input. What happened: System did not change the background immediately and became unresponsive to keyboard and mouse input for 10 minutes at which point the background changed to the selected one and responsiveness returned. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: gnome-control-center 1:3.36.2-0ubuntu1 ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41 Uname: Linux 5.4.0-37-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.3 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Fri Jun 26 15:50:44 2020 ExecutablePath: /usr/bin/gnome-control-center InstallationDate: Installed on 2020-06-13 (13 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1885330/+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
