https://bugs.kde.org/show_bug.cgi?id=477152
Bug ID: 477152
Summary: Other monitor (via other input) dims while not
actively connected in a multi system multi monitor
set-up.
Classification: Plasma
Product: Powerdevil
Version: 5.27.9
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: bclep...@gmail.com
CC: m...@ratijas.tk, natalie_clar...@yahoo.de
Target Milestone: ---
SUMMARY
Other monitor (active via other input) dims while not actively connected in a
multi system multi monitor set-up.
System is not being used for a while and dims monitor 1.
As a result monitor 2 dims as well (even though it is not showing/connected to
said system - but displaying another input).
STEPS TO REPRODUCE
Monitor 1 connected via DVI-D to 'desktop'.
Monitor 1 has no other inputs connected.
Monitor 2 connected via VGA to 'desktop'.
Monitor 2 connected via DisplayPort to docking station.
Monitor 1 is displaying DVI-D (so 'desktop').
Monitor 2 is displaying DisplayPort (so docking station).
Docking station is connected to a laptop.
Now wait until screen dims.
OBSERVED RESULT
'desktop' dims monitor 1 after not being used for a while (correct).
Monitor 2 dims as well (even though it is not showing/connected to desktop)
(unexpected).
Waking up monitor 1 (by e.g. mouse activity on 'desktop') also wakes up (i.e.
undims) monitor 2.
EXPECTED RESULT
Monitor 1 and monitor 2 are dimmed by their respective connected inputs (they
listen to the device they are connected to).
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.27.9
KDE Frameworks Version: 5.112.0
Qt Version: 5.15.11
Kernel Version: 6.6.1-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i5-4590 CPU @ 3.30GHz
Memory: 15,5 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 4600
Manufacturer: Gigabyte Technology Co., Ltd.
Product Name: B85M-HD3
ADDITIONAL INFORMATION
* 2 monitors (2x Dell P2314H)
Energy Smart is off, DDC/CI disabled, LCD conditioning enabled (on both)
* Dell docking station D6000 USB-C
* System (name 'desktop')
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