Bug 509510

Summary: Volume turns down after some seconds
Product: [Plasma] plasmashell Reporter: Axel Braun <axel.braun>
Component: Audio in generalAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED DOWNSTREAM    
Severity: normal CC: isma.af, nate
Priority: NOR    
Version First Reported In: 6.4.5   
Target Milestone: 1.0   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Axel Braun 2025-09-15 10:41:00 UTC 
I have a strange behaviour since ~1 month (around release of KDE 25.08):

When I watch a video (e.g. youtube) the sound over loudspeaker turns down (low volume) after some seconds. In the sound control panel, I can increase it up to 150%, with no effect.
This happens for
- videos from browser (e.g. youtube), tested Falkon and Firefox
- vlc player 

NOT affected: Earphone output

I did a cross check with the live media from Linux Mint, and could not observe the problem. So it seems not to be a hardware problem.

Operating System: openSUSE Tumbleweed 20250911
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
Kernel Version: 6.16.6-1-default (64-bit)
Graphics Platform: X11
Processors: 22 × Intel® Core™ Ultra 7 165H
Memory: 32 GiB of RAM (30.8 GiB usable)
Comment 1 Nate Graham 2025-09-16 22:12:53 UTC 
When this happens, it's an app doing it, taking advantage of a PulseAudio/PipeWire module that listens for apps asking for it. As such, it's not a KDE issue but rather a semi-expected combination of apps interacting with the way the system has been pre-configured.