SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** upgraded to Kunbuntu 21.10, was running good for over a month, within the last couple days (possibly after an update in Discovery) the bottom desktop Panel disappeared, even after reboot. I was able to add a new one and set it up close to what I had. Next time I start up, it is missing again. I couldn't find any info on this searching. I did find info on upgrading Plasma to 5.24 through backports, I'm not sure what this is, but I installed it hoping it would help. * Rebooted and now my screen is blank/black with only the mouse pointer. * I got to this somehow by I believe Alt-tab opening up a process list, menu for tools, opened up Info (on system), nothing showed up, but I could click Report a Bug that opened a browser to enter this. I'm not sure how anyone can help as I don't have access to do anything on my computer which is a Dell tower, using HDMI output. I can get to Konsole. STEPS TO REPRODUCE 1. install Plasma 5.24 backports 2. reboot 3. OBSERVED RESULT - blank black screen with mouse pointer, no clicking or right clicking do anything. EXPECTED RESULT - expected to get Panel back SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Kubuntu 21.10 * can't acces anything to get System Info * (available in About System) KDE Plasma Version: 5.24 KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
updated product to Plasma
Upon reboot (again), a KWIN (stopped?) warning came up, under report a bug from the error window, I saw 'kwin 5.22.5 no longer supported'. Before I tried to remove the backports to restore, I tried 'sudo pkcon update' which upon this next reboot, I can now see the desktop screen except for the original problem of no Panel. This still leaves the issue of the Panel disappearing on boot up. I hope there is a fix so I will not need to add a Panel every time I boot up. I hope this helps with correcting this bug, to maybe check for appropriate versions before it installs or to add the correct versions, if this is the issue.
*** Bug 450585 has been marked as a duplicate of this bug. ***
*** Bug 450586 has been marked as a duplicate of this bug. ***
(Amnon from comment #3) > There is a solution here: > > https://www.kubuntuforums.net/forum/currently-supported-releases/kubuntu-21-10-impish-indri/desktop-environment-support-aa/660790-after-upgrade-to-plasma-5-24-system-is-broken#post660791
(In reply to Behzad A from comment #5) > (Amnon from comment #3) > > There is a solution here: > > > > https://www.kubuntuforums.net/forum/currently-supported-releases/kubuntu-21-10-impish-indri/desktop-environment-support-aa/660790-after-upgrade-to-plasma-5-24-system-is-broken#post660791 Same problem on KDE Neon. Solution fo kUbuntu not help