https://bugs.kde.org/show_bug.cgi?id=508434
Bug ID: 508434
Summary: Monitor brightness is incorrect after wakeup
Classification: Plasma
Product: kwin
Version First 6.4.4
Reported In:
Platform: Neon
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: output configuration
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
Created attachment 184218
--> https://bugs.kde.org/attachment.cgi?id=184218&action=edit
Screenshot of the menu in question
SUMMARY
Setting the monitor brightness to 90% using the Plasma menu item (lower right
corner) works successfully. However, after waking up from suspend the
brightness is reduced. Clicking the menu still shows the requested brightness
(90%), but I have to move the slider to another value (91%, say) to get a
correct brightness again.
STEPS TO REPRODUCE
1. Set a monitor brightness using the menu item
2. Suspend and wakeup
3. The monitor brightness is now lower than it was even though the value shown
in the menu is correct.
4. Move the menu slider to another value - the monitor brightness is now
correct for that new value.
OBSERVED RESULT
The monitor is dimmer than it should be.
EXPECTED RESULT
The monitor brightness should match that set in the menu item.
SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.1
Kernel Version: 6.14.0-27-generic (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i3-5005U CPU @ 2.00GHz
Memory: 9 GB of RAM (8.2 GB usable)
Graphics Processor: Intel® HD Graphics 5500
ADDITIONAL INFORMATION
Output of ddcutil detect:
Display 1
I2C bus: /dev/i2c-5
DRM connector: card1-DP-1
EDID synopsis:
Mfg id: HPN - UNK
Model: HP Z27
Product code: 13622 (0x3536)
Serial number: CN493817V8
Binary serial number: 0 (0x00000000)
Manufacture year: 2019, Week: 38
VCP version: 2.2
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