https://bugs.kde.org/show_bug.cgi?id=472008
Bug ID: 472008
Summary: Controlling monitor brightness over ddcutil sometimes
unreliable
Classification: Plasma
Product: Powerdevil
Version: 5.27.6
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: christ.de...@gmail.com
CC: m...@ratijas.tk, natalie_clar...@yahoo.de
Target Milestone: ---
SUMMARY
Controlling the brightness of the monitor using ddcutil generally works but is
wonky sometimes. (Due to the nature of ddcutil) it takes a short time until the
monitor has adjusted the brightness (like half a second). Therefore, for
example changing the brightness by scrolling on the brightness applet feels
choppy as it seems it does a blocking wait until the monitor reported the
changed brightness value.
Also, when the monitor is dimmed to a lower brightness value and is powered off
by Plasma because of no user input , it sometimes fails to reset to the
previous brightness setting when waking up the monitor again. It just stays at
the lowest brightness setting.
STEPS TO REPRODUCE
1. Change brightness by scrolling on the brightness control bar icon/applet
2. It feels very choppy
OBSERVED RESULT
It feels very choppy
EXPECTED RESULT
The brightness target value should be overwritten immediately, with the actual
monitor brightness following at a later point in time (when the ddcutil
communication succeeded)
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.107.0
Qt Version: 5.15.10
Kernel Version: 6.4.1-arch2-1 (64-bit)
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