https://bugs.kde.org/show_bug.cgi?id=508006
Bug ID: 508006
Summary: Display brightness improperly set after DPMS display
cycle on->off->on
Classification: Plasma
Product: kwin
Version First 6.4.4
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: colour-management
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
As of Plasma 6.4.4, when DPMS powers off my Asus ROG Strix XG27UCS, when it
powers on again, the monitor is dimmed. Upon unlocking the screen, the desktop
screen is severely darkened, except for the brightest colors, which seem to be
relatively normal.
STEPS TO REPRODUCE
1. Enable HDR mode
2. Lock the screen
3. Press escape so the screen shuts off
4. Wait for DPMS to activate and power it off completely
5. Press a key to wake the screen
6. Unlock the desktop
OBSERVED RESULT
Screen is darkened. This effect cannot be captured with a screen shot.
EXPECTED RESULT
Screen is not darkened.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux - kernel 6.16.0-5-cachyos (64-bit)
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.16.0
Qt Version: 6.9.1
ADDITIONAL INFORMATION
The effect goes away if I reset the display color settings, such as by toggling
the accuracy/efficiency setting, or by running the HDR tuning wizard.
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