KDE Plasma desktop crashes constantly after a system update

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I updated my system this morning through Discover where notable updates were Qt (6.10.1) and linux-firmware (2025-11-11). Upon rebooting and logging-in Plasma desktop started crashing immediately. Keyboard shortcuts and KRunner was working though, so I was able to navigate my system and write this post.

I looked online and found a report in Arch Linux forums from two days ago mentioning something similar. The fix mentioned there was to compile the Plasma desktop against the new version of Qt. I attempted to downgrade Qt to test this myself but was not successful.

I did also report this on Red Hat Bugzilla.

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its some calendar plugin. edit ~/.config/plasma-org.kde.plasma.desktop-appletsrc
remove everything after enabledCalendarPlugins=

(that line only, not everything below)

stolen from MausGames here Reddit - The heart of the internet

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I can verify that removing the enabledCalendarPlugins= avoids the crash.

of course this means you won’t have the digital clock plugins any longer (holidays and astronomical events, for example).

there’s a bad bug in the digital clock for sure.

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Yeah, I had enabled calendar synchronization with my Nextcloud server. Commenting out that line (prepending with a # symbol) fixed the constant crashing.

Thanks a lot!

I wonder what would be the best place to report this issue though.

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Hello all, my name is Steve (aka Farchord) and I am a Fedora KDE Packager.

We are aware of this issue. It was caused because of a minor Qt update (6.10.1) most likely. We have just rebuilt plasma-workspace which should fix this issue: Making sure you're not a bot!

Please do install it and give karma if it helped. But always feel free to report this to the #fedora-kde room on matrix: https://matrix.to/#/#kde:fedoraproject.org

And sorry about this. Minor Qt updates shouldn’t be causing such things, except
. well, they did this time.

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Oh also, do note: This does not affect Fedora 42. The Qt updates are delayed on ‘legacy’ branches.

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I also noticed that when working with panels the gdb tool spawns and is memory leaking causing excessive lag on the system where i have to kill the process since this update.

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That’s something you might need to submit upstream

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Just got hit with this. Updated my Fedora box a few hours ago and was greeted with a constant crash loop on next reboot. Tried reverting the update but that does not work. My plasma-org.kde.plasma.desktop-appletsrc file does not seem to have a calendar plugins line. Guess I just have to wait for the fix to hit the repos.

Update:

Found the line and commented it out. I’m now able to log back in without the crashes.

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I noticed the “systemctl --user status plasma-plasmashell” was saying it was crashing over and over. I did

sudo dnf history undo last

which got it back working again. So ‘downgrade’ worked for me.

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Thx, appreciated, but how do I install/update from bodhi? I tried to download all rpms and dnf install/upgrade them but that results in:

sudo dnf up *rpm
Updating and loading repositories:
Repositories loaded.
Problem 1: cannot install the best update candidate for package plasma-workspace-6.5.3-1.fc43.x86_64

  • nothing provides plasma-lookandfeel-fedora = 6.5.3-2.fc43 needed by plasma-workspace-6.5.3-2.fc43.x86_64 from @commandline
    Problem 2: problem with installed package
    


For now I’ve comment out the calendar stuff, which works a bit.

thx

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I don’t think it’s there yet, but you could get it from koji here:

in the ‘noarch’ section at URL:
https://kojipkgs.fedoraproject.org//packages/plasma-workspace/6.5.3/2.fc43/noarch/plasma-lookandfeel-fedora-6.5.3-2.fc43.noarch.rpm

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That’s it, I missed the ‘noarch ‘ rpm. thx!

In the mean time I see an advisory has been appeared, not yet in all mirrors. Impressed by the speed this has been resolved.

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verified this is fixed with today’s update plasma-workspace-6.5.3-2.fc43.x86_64

I am able to re-enable the digital clock plugins for astronomical events and holidays without crashes.

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That didn’t help me, I upgraded

sudo dnf upgrade plasma-workspace\*

and still have the crashing cycle:

systemctl --user status plasma-plasmashell

systemd[1212]: plasma-plasmashell.service: Start request repeated too quickly.
systemd[1212]: plasma-plasmashell.service: Failed with result 'core-dump'.
systemd[1212]: Failed to start plasma-plasmashell.service - KDE Plasma Workspace.

To the user this looks like the kde desktop blinks on and off 4 or 5 times then stays black with only a mouse pointer shown. I didn’t upgrade the qt6-qt* packages which I have excluded now. Maybe they must upgrade together?

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The new plasma-workspace was rebuilt using the latest qt6 packages so I would think you should upgrade those, too.

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Updates for today seemed to have resolved the issue for me.

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But this morning I get Plasma panel random crash. I apply this updates too. But my desktop still can run