Arch Linux

Afmer

Member

Registered: 2023-09-21

Posts: 25

[SOLVED]30 fps lock in desktop KDE Plasma

I have Arch KDE with native Nvidia drivers. I also have multiple monitors. After updating the system, I started experiencing strange jumps in fps. For some time the frequency is 60, and then the frequency drops to 30 and remains there for some time. Mostly it starts falling when I move the windows. But when I launch games, the fps becomes 60 and nothing lags. I also noticed that after disabling the composer with the command “qdbus org.kde.KWin /Compositor suspend” the problem disappears. What could be the problem?

Last edited by Afmer (2024-02-18 09:51:26)

Gravarty

Member

Registered: 2022-03-15

Posts: 6

Re: [SOLVED]30 fps lock in desktop KDE Plasma

Yeah, on my system it's even worse, i have the same problem where everything is locked to 30 FPS but even while gaming. MangoHud is showing 75 FPS while it's obviously 30 FPS. When watching YT videos on Firefox, the bug disappears and everything runs smoothly.
KDE with NVIDIA was always a bad experience but this was only with system animations and not the system entirely running on a locked framerate.

EDIT: It seems to be an issue with the current NVIDIA 545 driver, downgrading to 535 fixed it for some people.

Last edited by Gravarty (2023-12-05 21:30:08)

brownpaperbag

Member

Registered: 2024-02-07

Posts: 11

Re: [SOLVED]30 fps lock in desktop KDE Plasma

Had the same issue. Code below solved it. Also problem should be fixed in the next driver version.
Please see this https://forums.developer.nvidia.com/t/5 … /271602/33

~/.config/plasma-workspace/env/kwin.sh

#!/bin/sh
export KWIN_X11_FORCE_SOFTWARE_VSYNC=1