https://bugs.kde.org/show_bug.cgi?id=493329
Bug ID: 493329
Summary: Monitors attached after startup do not appear in the
brightness applet unless Powerdevil is manually
restarted
Classification: Plasma
Product: Powerdevil
Version: 6.1.90
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: tim.schneeber...@outlook.de
CC: natalie_clar...@yahoo.de
Target Milestone: ---
SUMMARY
I'm using a laptop running the Plasma 6.2 beta and occasionally connect an
external 4K monitor with DDC support to it.
I noticed that if I connect the monitor after startup, the brightness applet
does not list it.
If the monitor is connected during boot time, the brightness applet shows it as
expected until I disconnect and reconnect it later.
By restarting powerdevil (`killall org_kde_powerdevil; kstart
/usr/lib/org_kde_powerdevil`) manually, after the new monitor has been
connected, it correctly appears in the applet as expected.
STEPS TO REPRODUCE
1. Attach a secondary monitor with DDC support after Plasma & Powerdevil has
launched
2. Connected monitor does not appear in the brightness applet
OBSERVED RESULT
Only the internal laptop screen is listed in the applet. The other monitor is
missing.
EXPECTED RESULT
The external monitor should be listed in the applet after plugging it in.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux using the `kde-unstable` package repo
KDE Plasma Version: 6.1.90
KDE Frameworks Version: 6.6.0
Qt Version: 6.8.0
ADDITIONAL INFORMATION
Apart from detecting new monitors, the applet also doesn't detect whether a
monitor has been removed.
For example, if I disconnect my external monitor, the brightness applet
continues to list it even though it is no longer present.
Only when I attempt to move its brightness slider in the applet, does
Powerdevil seem to realize that the monitor is missing and remove it from the
list.
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