System freeze on window move

Help
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1

I have an odd issue. Ever since upgrading to KDE Plasma 6.3.0 my system has freezing issues from moving and dragging windows around.

To reproduce:
Grab a window by it’s titlebar, preferably a little lower in the titlebar. Move the window to the top of the desktop. The window snaps to the top edge. Attempt to move the window beyond the top edge of the desktop. The GUI starts to slow down, and potentially freezes the system.

This occurs while running a while, or upon fresh reboots. Moving a Firefox freezes it, as does moving a Konsole window. Not sure about other windows. It happens on multi-monitor screens, too.

Arch Linux, fully updated
Linux kernel 6.13.2
KDE Plasma 6.3.0 running Wayland, Breeze theme
KDE Frameworks 6.11.0
KDE Gear 24.12.2
AMD 5600g processor
AMD 6650XT
MESA 24.3.4

I could probably fill out a bug report competently, given enough time, but I’d like to know if the problem is just happening here or if it’s more widespread. Is this happening to anyone else?

2

Hi! If I’m reading your description correctly, then this issue has been reported in the KDE Bugtracking System here: 499913 – kwin_wayland uses 100% CPU when I drag window to top edge multiple times and freezes desktop

If you’d like, you can add yourself to the CC list in Bugzilla to get email notifications whenever new comments are added or the status is changed :slight_smile:

That CC list checkbox is located here - making sure that’s checked, then choosing “Save Changes” will add you:

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3

Much thanks for the reply. It seems that everyone else is 20 steps ahead of me and the problem was discovered a while ago. I probably should have searched the bug tracker a little more carefully.
Anyhow, I’m not too worried anymore and I’ll just wait for the eventual patch to arrive.
Would it be wise to mark this thread as solved, or is there a better option to close this?

1 Like
4

It was only reported 4 days ago, so I wouldn’t say you’re 20 steps behind anyone! :slight_smile:

For “Help” posts like this on KDE Discuss, you can click the “checkbox” icon at the bottom of a post to mark that it answered your question:

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Doing that lets folks browsing the topic list identify which Help posts have been solved and which ones might still need assistance, and helps others folks coming along later with similar issues quickly jump to the post that answered the question (especially in longer topics).

5

I have these freezes too with kde plasma 6.3.0 and wayland. It is reproducable like you wrote. Grab a window on the tiltle bar an move is quickly. Than the freeze ossurs.

To avoid an unclean shutdown, i tried:
From another computer i can login via ssh and with “killall -9 bash” i can get a textmode login on the freezed machine again. Of coure the ssh connection is killed too with this command.

Now I can start kde plasma 6.3.0 with wayland again.
To start “kde”, is use the command “dbus-run-session /usr/bin/startplasma-wayland”

With the older kde plasma 6.2.5 there is no freeze.

I have this kind of problem since i moved to wayland one year ago. Most Versions of kde crashed.

kde plasma 6.2.5 with kde-frameworks 6.10.0 or 6.11.0 is the first and only version without freezes.

linux kernel 6.12.1 to 6.12.15
Ryzen 3700X
X470 chipset
64 GB of RAM
AMD RX 7600
Gentoo Linux