https://bugs.kde.org/show_bug.cgi?id=500116
Bug ID: 500116
Summary: Monitor brightness settings go to 100% when monitor /
system wakes up
Classification: Plasma
Product: plasmashell
Version: git-stable-Plasma/6.3
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Power management & brightness
Assignee: plasma-b...@kde.org
Reporter: marc_sm...@gmx.com
Target Milestone: 1.0
SUMMARY
Monitor brightness goes back to 100% (from 15%) when monitor wakes up or when
system wakes up from suspend.
STEPS TO REPRODUCE
1. Allow system to suspend / monitor to sleep
2. Wake system / monitor up
3. Observe 100% of monitor brightness
OBSERVED RESULT
100% of monitor brightness
EXPECTED RESULT
Brightness should stay on configured level, in this case - 15%
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.12.13-1-lts
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.2
ADDITIONAL INFORMATION
```
Feb 15 10:43:35 xmg org_kde_powerdevil[3965]: org.kde.powerdevil:
[DDCutilDisplay]: ddca_get_non_table_vcp_value -3007
Feb 15 10:43:35 xmg org_kde_powerdevil[3965]: dh=Display_Handle[i2c-6: fd=32],
Keeping adjusted sleep multiplier 2,00 for SE_POST_WRITE or
SE_POST_SAVE_SETTINGS
Feb 15 10:43:35 xmg polkit-kde-authentication-agent-1[3964]: qt.qpa.wayland:
There are no outputs - creating placeholder screen
Feb 15 10:43:35 xmg kactivitymanagerd[3907]: qt.qpa.wayland: There are no
outputs - creating placeholder screen
Feb 15 10:43:35 xmg kwalletd6[3661]: qt.qpa.wayland: There are no outputs -
creating placeholder screen
Feb 15 10:43:35 xmg jamesdsp[4228]: qt.qpa.wayland: There are no outputs -
creating placeholder screen
Feb 15 10:43:35 xmg DiscoverNotifier[4246]: qt.qpa.wayland: There are no
outputs - creating placeholder screen
Feb 15 10:43:35 xmg kdeconnectd[4166]: 2025-02-15T10:43:35 qt.qpa.wayland:
There are no outputs - creating placeholder screen
Feb 15 10:43:35 xmg yakuake[4236]: qt.qpa.wayland: There are no outputs -
creating placeholder screen
Feb 15 10:43:35 xmg kded6[3813]: qt.qpa.wayland: There are no outputs -
creating placeholder screen
Feb 15 10:43:35 xmg xdg-desktop-portal-kde[4339]: qt.qpa.wayland: There are no
outputs - creating placeholder screen
Feb 15 10:43:35 xmg plasmashell[3889]: kde.plasmashell: requesting unexisting
screen available rect -1
Feb 15 10:43:35 xmg plasmashell[3889]: kde.plasmashell: requesting unexisting
screen available rect -1
Feb 15 10:43:35 xmg kscreenlocker_greet[28698]: qt.qpa.wayland: There are no
outputs - creating placeholder screen
Feb 15 10:43:35 xmg plasmashell[3889]: kde.plasmashell: requesting unexisting
screen available rect -1
Feb 15 10:43:35 xmg plasmashell[3889]: kde.plasmashell: requesting unexisting
screen available rect -1
Feb 15 10:43:35 xmg org_kde_powerdevil[3965]: qt.qpa.wayland: There are no
outputs - creating placeholder screen
Feb 15 10:43:35 xmg plasmashell[3889]: qt.qpa.wayland: There are no outputs -
creating placeholder screen
Feb 15 10:43:35 xmg plasmashell[3889]: kf.plasma.quick: Exposed with no visual
parent. Window positioning broken.
Feb 15 10:43:35 xmg plasmashell[3889]: kf.plasma.quick: Exposed with no visual
parent. Window positioning broken.
Feb 15 10:43:35 xmg plasmashell[3889]: kf.plasma.quick: Exposed with no visual
parent. Window positioning broken.
Feb 15 10:43:35 xmg plasmashell[3889]: kf.plasma.quick: Exposed with no visual
parent. Window positioning broken.
Feb 15 10:43:35 xmg plasmashell[3889]: org.kde.applets.brightness: D-Bus action
"KeyboardBrightnessControl" is not available at service
"org.kde.Solid.PowerManagement"
Feb 15 10:43:36 xmg plasmashell[3889]: org.kde.applets.brightness: D-Bus action
"KeyboardBrightnessControl" is not available at service
"org.kde.Solid.PowerManagement"
Feb 15 10:43:37 xmg org_kde_powerdevil[3965]: dh=Display_Handle[i2c-6: fd=32],
Keeping adjusted sleep multiplier 1,60 for SE_POST_WRITE or
SE_POST_SAVE_SETTINGS
Feb 15 10:43:43 xmg jamesdsp[4228]: [10:43:43.758] [DBG]
FilterContainer::on_link_changed::<lambda>: No app linked to our device wants
to play. Unlinking our filters.
```
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