[Plasma 6.2] Performance and speed severely degraded after upgrading

Help
22

I verified on other laptops and confirm it’s Night Light problem, it causes the slowness when it’s enabled and only during its time of activation.

1 Like
23

It seems many Arch users are experienced substantial performance degradation after upgrading to KDE 6.2, including me. In my case the most visible and annoying is mouse cursor lagging - while moving it around, the intel_gpu_top command shows 100% iGPU load.

24

Does disabling triple buffering help for anyone? See 488860 – Massive frame drops with intel iris xe graphics and triple buffering

Also seems related to [Plasma 6.1] Did something changed in performance for Intel CPUs? - #3 by naradoma h

25

A general tip when diagnosing speed issues: install and run sudo atop. A top will highlight the bottlenecks in speed.

26

Upgrading to KDE 6.2.1, which disabled triple buffering on nVidia GPUs (I have Intel’s iGPU and nVidia’s dGPU on my laptop) did help, but haven’t resolved all issues.

27

I had to reinstall my OS after a terrible data disaster (I had nothing left :cry: ). I found that plasma 6.2.1 is working fine on a brand new system and the mouse is no longer lagging.

28

kwin 6.2.1.1 improved the slowness when Night Light is enabled, but it’s not at the level like it was on Plasma 6.1, mouse and animations lagging is still noticeable.

1 Like
29

Agree, 6.2.1.1 definitely improved things but is still worse than 6.1.

I noticed that the lag depends on the underlying window. For instance moving the mouse in kdevelop’s editor window is really smooth but moving the mouse in firefox or thunderbird still is very laggy.

Also noticed a weird issue where the mouse pointer keeps getting bigger and bigger when moving it back and forth.

30

That’s not a issue, but a feature to find the cursor. Can be disabled.

1 Like
31

Also noticed a weird issue where the mouse pointer keeps getting bigger and bigger when moving it back and forth.

It can be controlled in
System Settings → Accessibility → Shake Cursor

I liked the idea of that but not the implemention because it’s easy to activate “big cursor” accidentally.
What I do instead is go to “System Settings”-> “Window Management” → “Desktop Effects” and check the box for “Track Mouse”, and I set the configuration for the keys as “Ctrl” and “Meta”. So you just press Ctrl and the Meta key (the Windows key) and the mouse shows with a spinning animation