Bug 488171

Summary:	Screen brightness dims after some idle time, but isn't restored afterwards
Product:	[Plasma] Powerdevil	Reporter:	Leonardo <leonardopereira.silva>
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs>
Status:	RESOLVED DUPLICATE
Severity:	minor	CC:	equeim, jpetso, me, natalie_clarius, nate
Priority:	NOR
Version:	6.0.5
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	current power saving settings

Description Leonardo 2024-06-07 17:20:09 UTC

Created attachment 170233 [details]
current power saving settings

SUMMARY
If I leave my computer idle for some time, power saver kicks in and redueces screen brightness, eventualy turning off the screen. After waking up, the brightness stays at 30%, instead of going back up to 100%, even though the brightness indicator in the system tray shows 100%. 

STEPS TO REPRODUCE
1. Leave the coputer idling for X amount of time (10 min default)
2. Wait for the screen to turn off
3. Move the mouse or press any key on the keyboard to turn it back on

OBSERVED RESULT
The screen comes back at around 30% brightness

EXPECTED RESULT
Screen should return to previously set brightness value (in my case, 100%)

SOFTWARE/OS VERSIONS:
OS: Arch Linux x86_64
Kernel: Linux 6.9.3-zen1-1-zen  
KDE Plasma Version: 6.0.5
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.1
Graphics Platform: Wayland

HARDWARE INFORMATION:
Motherboard: MS-7C37
CPU: 12 × AMD Ryzen 5 5600X 6-Core Processor
GPU: AMD Radeon RX 6600M


ADDITIONAL INFORMATION
LG 29WK600 Monitor connected through DisplayPort.
This seems related to https://bugs.kde.org/show_bug.cgi?id=476540 but happening on a newer version of Plasma

Comment 1 equeim 2024-06-08 21:04:20 UTC

I have the same issue on openSUSE Tumbleweed.
GPU: Radeon 6700 XT
Monitors: DELL S2340L connected via HDMI and GIGABYTE G27Q connected via DisplayPort.
G27Q also has HDR enabled.

Comment 2 equeim 2024-06-08 21:05:16 UTC

I also can change brightness via system tray applet, but it is often out of sync with actual brightness level.

Comment 3 Nate Graham 2024-06-10 20:29:53 UTC

This is a thing we already have an open bug report, right Jakob? I can't find one though.

Comment 4 equeim 2024-06-12 21:13:28 UTC

(In reply to Nate Graham from comment #3)
> This is a thing we already have an open bug report, right Jakob? I can't
> find one though.

Is it https://bugs.kde.org/show_bug.cgi?id=476540 ? Seems like it wasn't fixed after all. I'm experiencing it with Plasma 6.0.5

Comment 5 Nate Graham 2024-06-13 15:07:18 UTC

Yes, looks like it. Thanks.

*** This bug has been marked as a duplicate of bug 476540 ***