Created attachment 177971 [details]
Logs from the `journalctl --user --unit plasma-powerdevil.service -e` after service restart

SUMMARY
Hi, when my pc screen locks after 10 mins of idle, kde powerdevil brightness sliders are disappearing for my 2 monitors and I have to restart it through `systemctl --user restart --unit plasma-powerdevil.service` to get the sliders back. `ddcutil -d 1 setvcp 10 ,brightness>` is already working even when the sliders are not there, so I'm guessing it's about the powerdevil. However I don't see any critical/error messages on the journalctl too.

STEPS TO REPRODUCE
1. Restart the powerdevil with `systemctl --user restart --unit plasma-powerdevil.service`.
2. Observe that all monitor brightness sliders are working fine.
3. Wait ~10 mins until screen locks and monitor sleeps (not the pc).
4. Unlock the desktop and observe that the sliders are not there anymore.

OBSERVED RESULT
-

EXPECTED RESULT
-

SOFTWARE/OS VERSIONS
Windows: -
macOS: -
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Arch linux 6.12.6
KDE Plasma Version: -
KDE Frameworks Version: -
Qt Version:
burakcank@archlinux-pc ~ [0|1]> yay -Q | grep -i "kde\|plasma"
kde-cli-tools 6.2.4-1
kde-gtk-config 6.2.4-1
kdeclarative 6.9.0-1
kdeconnect 24.12.1-1
kdecoration 6.2.4-1
kded 6.9.0-1
kdegraphics-mobipocket 24.12.0-1
kdegraphics-thumbnailers 24.12.0-1
kdeplasma-addons 6.2.4-1
kdesu 6.9.0-1
libblockdev 3.2.1-3
libblockdev-crypto 3.2.1-3
libblockdev-fs 3.2.1-3
libblockdev-loop 3.2.1-3
libblockdev-mdraid 3.2.1-3
libblockdev-nvme 3.2.1-3
libblockdev-part 3.2.1-3
libblockdev-swap 3.2.1-3
libplasma 6.2.4-1
plasma-activities 6.2.4-1
plasma-activities-stats 6.2.4-1
plasma-browser-integration 6.2.4-1
plasma-desktop 6.2.4-1
plasma-disks 6.2.4-1
plasma-firewall 6.2.4-2
plasma-integration 6.2.4-1
plasma-meta 6.1-1
plasma-nm 6.2.4-1
plasma-pa 6.2.4-1
plasma-systemmonitor 6.2.4-1
plasma-thunderbolt 6.2.4-1
plasma-vault 6.2.4-1
plasma-welcome 6.2.4-1
plasma-workspace 6.2.4-1
plasma-workspace-wallpapers 6.2.4-1
plasma5support 6.2.4-1
polkit-kde-agent 6.2.4-1
qt5-base 5.15.16+kde+r130-3
qt5-declarative 5.15.16+kde+r22-3
qt5-location 5.15.16+kde+r7-3
qt5-svg 5.15.16+kde+r5-3
qt5-tools 5.15.16+kde+r3-6
qt5-webchannel 5.15.16+kde+r3-3
xdg-desktop-portal-kde 6.2.4-1

ADDITIONAL INFORMATION