https://bugs.kde.org/show_bug.cgi?id=513917
Bug ID: 513917
Summary: When Night Light is active Plasma is unusable on Intel
GPU
Classification: Plasma
Product: kwin
Version First 6.5.4
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: xwayland
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
When Night Light is active the desktops responsiveness is very bad. It's pretty
much unusable, I get noticeable lag between pressing keys on my keyboard and
them showing up in konsole. No such issue when using X11 session. I'm using an
old Dell laptop with an Intel GPU
STEPS TO REPRODUCE
1. Login to Plasma Wayland session
2. enalbe Night Light (wait till it's active)
OBSERVED RESULT
Desktop becomes slow. Typing is slow, interacting with K menu is slow. Night
Light itself works as I can see the
screen colour changing to more warm/red.
After deactivating Night Light it returns to normal after a few seconds. I
think the colour shift is gradual.
EXPECTED RESULT
Desktop works as fast as before Night Light was activated. As fast as X11
session which doesn't have this slowdown when using Night Light.
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 43
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.1
Kernel Version: 6.17.12-300.fc43.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 2 × Intel® Core™2 Duo CPU T7250 @ 2.00GHz
Memory: 4 GiB of RAM (3.8 GiB usable)
Graphics Processor: llvmpipe
Manufacturer: Dell Inc.
Product Name: Latitude D630
ADDITIONAL INFORMATION
lspci output regarding my GPU:
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960
Integrated Graphics Controller (primary) (rev 0c)
This has become a problem since Fedora upgraded to Plasma 6.3 (not 100% sure,
might've been 6.2). Before Plasma Wayland didn't have this issue when using
Night Light. I've never experienced this issue on Plasma X11 session.
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