Bug 471811

Summary: Laptop screen auto-dimming
Product: [Unmaintained] Powerdevil Reporter: Milton Hagler <miltonh26>
Component: generalAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: me, natalie_clarius, xaver.hugl
Priority: NOR    
Version First Reported In: 5.27.5   
Target Milestone: ---   
Platform: Manjaro   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Milton Hagler 2023-07-01 03:09:34 UTC 
SUMMARY
***
Screen is dimming itself without any user interactions, even when the laptop is plugged in to power. It acts as if power has been removed and it is running on the battery. The power removed notification sounds, though the power is still plugged in, and the screen dims by on its own. 

This has been observed when an external monitor is being used on the laptop's HDMI port. 

***

STEPS TO REPRODUCE
1. Plug in power the laptop from the power adapter
2. Attach an external monitor to the HDMI port
3. Wait for it to happen. 

OBSERVED RESULT
Laptop screen auto-dims
The screen brightness can be returned to its previous setting manually
Occurs randomly, sometimes in 10 min intervals, other times at longer intervals

EXPECTED RESULT
The screen brightness not change and maintain its setting

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9

ADDITIONAL INFORMATION
X11
Kernel: 6.1.31-2-MANJARO
AMD Ryzen 7 4800H
AMD Radeon Graphics
Comment 1 Natalie Clarius 2023-08-10 19:26:44 UTC 
When that happens, if you move your mouse over the battery icon in the panel, what does it say? - e.g. "Battery at 60%, Charging"

Also, when this happens again, can you please open Konsole, enter 

qdbus --system org.freedesktop.UPower /org/freedesktop/UPower/devices/line_power_AC org.freedesktop.UPower.Device.Online

and post the result here?
Comment 2 Bug Janitor Service 2023-08-25 03:45:23 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 3 Bug Janitor Service 2023-09-09 03:45:19 UTC 
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!