https://bugs.kde.org/show_bug.cgi?id=484323
an.in...@free.fr changed:
What |Removed |Added
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CC| |an.in...@free.fr
--- Comment #50 from an.in...@free.fr ---
Same CPU load issue when screen is locked. Debian testing (Plasma 6.2.3,
framework 6.6.0, Qt 6.7.2, kernel 6.11.10, X11, AMD 7840U with iGPU).
Disabling compositing (W/A found here:
https://unix.stackexchange.com/questions/782688/kde-lockscreen-kscreenlocker-greet-high-cpu-usage)
helped in my case, the CPU load is then negligible and no crazy fan noise. But
I'm not sure it solves the root issue, it may just make it less CPU expensive.
The following things seem to have an impact:
1) external screen on or off;
2) screen power saving when locked;
3) compositor on or off.
At first, I had two screens with compositor on. Then systematically, when
locking the screen the following happens:
- power saving flip-flop: the screens go into power saving (turned off), then
quickly turn back on. This cycle repeats;
- the CPU load increases, the fan gets loud.
Turning off the external screen doesn't help in this case, same issue with just
the internal one.
Turning the compositor off as recommended in the previous link helps with the
CPU load. But the power state flip-flop still happens.
Then turning the external screen fixes the flip-flop too. With both only laptop
screen and compositor off, the internal screen goes into low power and remains
there. No load, no fan noise.
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