Bug 496295

Summary:	Change of display brightness by scroll not working after resume from sleep
Product:	[Plasma] plasmashell	Reporter:	Murali Krishna <husband.of.deepu>
Component:	Brightness and Color	Assignee:	Plasma Bugs List <plasma-bugs>
Status:	NEEDSINFO WAITINGFORINFO
Severity:	normal	CC:	husband.of.deepu, natalie_clarius, nate
Priority:	NOR
Version:	master
Target Milestone:	1.0
Platform:	openSUSE
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=494522
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Murali Krishna 2024-11-15 08:00:29 UTC

SUMMARY

Scrolling mouse wheel on "Brightness and color" icon in panel changes display brightness on Samsung LED monitor connected on HDMI. But once the system goes to sleep and wakes,  the same doesn't work. scrolling the mouse wheel does nothing. The same works after system restart. My PC is a MSI Cubi mini PC with Intel N100 processor, using Stock OpenSuse Tumbleweed OS. Display is a Samsung 24 Inch LED monitor connected on HDMI. 

STEPS TO REPRODUCE
1. Scrolling the wheel on Brightness and color indicator in notification panel changes display brightness on system boot.
2. Put the PC to sleep on inactivity.
3. wake up the pc and sign-in. the brightness won't change on mouse scroll till next PC boot.  

OBSERVED RESULT
Brightness not changing on wake from sleep

EXPECTED RESULT
Brightness should change on mouse scrool

SOFTWARE/OS VERSIONS
Linux: OpenSuse Tumbleweed latest build. 

Linux/KDE Plasma:  OpenSuse Tumbleweed 20241113 (Tumbleweed)
KDE Plasma Version: 6.2.3
KDE Frameworks Version: 6.8.0
Qt Version: 6.8.0

ADDITIONAL INFORMATION

Comment 1 Nate Graham 2024-11-15 20:49:55 UTC

Which Samsung monitor specifically? An Odyssey Neo G5 or G9?

Comment 2 Murali Krishna 2024-11-16 04:50:02 UTC

Samsung Essentials S3 LED Monitor (LS24C330GAWXXL)

Comment 3 Murali Krishna 2024-11-16 04:50:36 UTC

(In reply to Nate Graham from comment #1)
> Which Samsung monitor specifically? An Odyssey Neo G5 or G9?

Samsung Essentials S3 LED Monitor (LS24C330GAWXXL)

Comment 4 Nate Graham 2024-11-18 17:01:13 UTC

Ok, so not the bug I was thinking of, then... maybe. Curious that it's also a Samsung monitor. Maybe a whole bunch of Samsung monitors are faulty.

Does the slider in the widget work? Do the brightness up/down keys on your keyboard (if they exist) work?

Comment 5 Murali Krishna 2024-11-19 01:15:17 UTC

(In reply to Nate Graham from comment #4)
>Slider for changing brightness exists and works on system boot. strangely, the brightness slider dissappears once the screen goes to sleep on inactivity and resumes after a key press on keyboard. On restarting the PC, the brightness slider appears again.

Comment 6 Murali Krishna 2024-11-19 01:16:26 UTC

Slider for changing brightness exists and works on system boot. strangely, the brightness slider dissappears once the screen goes to sleep on inactivity and resumes after a key press on keyboard. On restarting the PC, the brightness slider appears again.