KDE Plasma on Arch Linux Behaving Weirdly | Support Requested

LeFauconBlanc · 2026-09-05 02:35:31

https://imgur.com/a/kde-plasma-on-arch- … ed-2Xs8B3d

Since about a day ago or so (maybe two), my computer has been behaving strangely:

- Neither Koko or Haruna can play videos

- Desktop previews/views (four finger swipe up) is wacked out and missing graphics (see video)

- Wherever my user Icon is it's a square instead of the circle that it usually is on Plasma

- Lock screen background isn't blurred + square user icon

- Missing images/graphics like Spectacle screen-capture when I capture a picture/video.

I got a popup in my system tray a day ago or so and I didn't realize the problem yet so I clicked and selected never show again (like the idiot I am) I'm trying to remember what it was, it might've been KWin, but I'm not entirely sure, and I think it was relevant. If anybody has any idea as to what it could be or a sure way to test/diagnose to see then I'd be very grateful as I've been trying to figure this out for hours. I'm on a ThinkPad T14 Gen 3 AMD Ryzen. I'm on Wayland of course.

It might've also been that my computer hibernated during an update but I've already synced all my packages and am 100% up-to-date.

More info upon request. Thanks all!!!

seth · 2026-09-05 06:29:01

glxinfo -B
eglinfo -B
vulkaninfo --summary
qdbus6 org.kde.KWin /KWin supportInformation

LeFauconBlanc · 2026-09-05 14:57:46

Here's the output. I'm reading it.

pastebin.com/4nVSs8H5

seth · 2026-09-05 17:18:58

You're not running on software emulation, might be https://bbs.archlinux.org/viewtopic.php … 4#p2308904

LeFauconBlanc · Yesterday 17:49:31

Unfortunately, I rolled back to 26.1.8 and it still isn't fixed (post reboot). Is it a mesa bug/GPU thing or a desktop environment issue itself w/ Plasma? If I were to just wait and keep my system up-to-date would a fix eventually roll around? If you have any more log commands you think would reveal the culprit I'd love to run them. I don't remember running/doing anything that caused this, it almost seemed like it just happened randomly.

It does seem that Mesa 26.2.1 came with a *lot* of bugs, and again, TYSM.

seth · Yesterday 18:31:16

Do you run into the same problem w/ a fresh user account?

LeFauconBlanc · Yesterday 18:55:46

It works perfectly when I create a new user, thanks Seth! But how can I fix my user so I don't have to make a new one??

Last edited by LeFauconBlanc (Yesterday 18:56:11)

seth · Yesterday 19:55:57

It's gonna be the kwinrc or some plasma config in ~/.config
Move those away (while not being logged into plasma!) and see whether that helps
If not it could be one of the various environment variables that impact the Qt and KWin rendering process - compare "printenv" between the good and bad user for that.

GerBra · Yesterday 19:59:24

seth wrote:

It's gonna be the kwinrc or some plasma config in ~/.config

@OP
Maybe also a try: ~/.cache
(mv/rename it is a safe way...)

//Edit: Also look if your problem user has extern extensions/plasmaoids etc. that a/the "fresh" user not has in the "clean" state.
Switching the used theme to the default is also a test.

And: always do only **ONE** change a time, not several "things" - you get no hint where the reason was if it gots better....

Last edited by GerBra (Yesterday 20:04:36)

Arch Linux

#1 2026-09-05 02:35:31

KDE Plasma on Arch Linux Behaving Weirdly | Support Requested

#2 2026-09-05 06:29:01

Re: KDE Plasma on Arch Linux Behaving Weirdly | Support Requested

#3 2026-09-05 14:57:46

Re: KDE Plasma on Arch Linux Behaving Weirdly | Support Requested

#4 2026-09-05 17:18:58

Re: KDE Plasma on Arch Linux Behaving Weirdly | Support Requested

#5 Yesterday 17:49:31

Re: KDE Plasma on Arch Linux Behaving Weirdly | Support Requested

#6 Yesterday 18:31:16

Re: KDE Plasma on Arch Linux Behaving Weirdly | Support Requested

#7 Yesterday 18:55:46

Re: KDE Plasma on Arch Linux Behaving Weirdly | Support Requested

#8 Yesterday 19:55:57

Re: KDE Plasma on Arch Linux Behaving Weirdly | Support Requested

#9 Yesterday 19:59:24

Re: KDE Plasma on Arch Linux Behaving Weirdly | Support Requested

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