https://bugs.kde.org/show_bug.cgi?id=411050
Bug ID: 411050
Summary: graphical brightness control does not read
actual_brightness before changing it
Product: kde
Version: unspecified
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: unassigned-b...@kde.org
Reporter: report...@mailna.biz
Target Milestone: ---
SUMMARY
If I change screen brightness using Fn+Up/Down, the progress bar on the toast
icon matches the current level of brightness, but if it's modified by console,
there can arise problems.
STEPS TO REPRODUCE
1. Start your system with 100% brightness, Fn+Up will display a full progress
bar
2. Change brightness from terminal like "echo 35 >
/sys/class/backlight/nvidia_0/brightness". The screen will dim automatically
3. Now try to increase the brightness using the hotkeys, with Fn+Up. You will
notice that the brightness doesn't increase and the progress bar is like at
100%
OBSERVED RESULT
KDE does not 'cat /sys/class/backlight/nvidia_0/actual_brightness' just before
each brightness change request, but instead relies on what value it should have
if I only had used hotkey.
EXPECTED RESULT
It should re-read the actual_brightness on each key combo, to see if there was
a brightness change in-between.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
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