https://bugs.kde.org/show_bug.cgi?id=493111
Bug ID: 493111
Summary: Power management feature "dim display automatically"
resets external display brightness to match the
internal display brightness
Classification: Plasma
Product: Powerdevil
Version: 6.1.90
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: chermnykh2...@gmail.com
CC: natalie_clar...@yahoo.de
Target Milestone: ---
STEPS TO REPRODUCE
1. Have powerdevil built without ddcutil support (so that the external screen
uses plasma's color management as its brightness source)
2. Have multiple displays (in my case it's internal laptop screen an an
external monitor)
3. Configure power management to dim the displays automatically after some time
4. Set the external screen brightness to 100%; set the internal screen
brightness to any value that is not 100% or 0% (e.x. 30%)
5. Wait the configured dimming timeout
6. Move mouse cursor to cancel screen dimming
OBSERVED RESULT
The brightness for all displays is set to 30% causing the perceived brightness
of the external display to be low
EXPECTED RESULT
The internal display brightness should at 30%; the external display brightness
should stay at 100% as configured
SOFTWARE/OS VERSIONS
Operating System: NixOS 24.11
KDE Plasma Version: 6.1.90
KDE Frameworks Version: 6.5.0
Qt Version: 6.7.2
Kernel Version: 6.10.9-zen1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800H with Radeon Graphics
Memory: 23.3 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3050 Ti Laptop GPU/PCIe/SSE2
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