[Powerdevil] [Bug 352442] extremely slow response on brightness hotkeys

[Igor Poboiko]

https://bugs.kde.org/show_bug.cgi?id=352442

--- Comment #4 from Igor Poboiko <igor.poboiko at gmail.com> ---
(In reply to Martin Klapetek from comment #3)
> Can you check if there's any process running at 100% cpu right after you
> press the brightness key? Or perhaps if plasma is frozen (try moving your
> mouse over taskbar and see if there's any change)?
Nope, there aren't any; and plasma keeps running (popups pops up, start menu
launches)

> Also, can you please open Konsole and run this:
> 
> $ killall kded5 && kded5 &
> 
> now change brightness, what is the output on Konsole?

It gives me a lot of messages like:

powerdevil: Screen brightness value:  609
powerdevil: Screen brightness value max:  937
powerdevil: set screen brightness value:  656
powerdevil: Screen brightness value:  609
powerdevil: Screen brightness value max:  937
powerdevil: Screen brightness value:  656
powerdevil: Brightness changed!!
powerdevil: Screen brightness value max:  937
powerdevil: Screen brightness value:  656
powerdevil: Screen brightness value max:  937
powerdevil: set screen brightness value:  703

but it writes it not on keypress but on actual brightness change (i.e. after
some time after keypress)

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