Bug 507517

Summary:	volume jumps to maximum when mixer popup opens
Product:	[Plasma] plasmashell	Reporter:	Luan Vitor Simião Oliveira <luanv.oliveira>
Component:	Audio Volume widget	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	major	CC:	isma.af, nate
Priority:	NOR
Version First Reported In:	6.4.3
Target Milestone:	1.0
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Luan Vitor Simião Oliveira 2025-07-26 17:35:30 UTC

SUMMARY
opening the volume popup makes the volume on the usb ALC4082 from my motherboard jump to 100% when using hw mixing, but both wireplumber and alsa report that the volume is at the same level.

changing the volume using the ui or the shortcut will make the volume go back to the original level

this happens every time

STEPS TO REPRODUCE
1. play audio with any app (with no audio playing it doesn't happen)
2. open audio widget

OBSERVED RESULT
volume jumps to maximum on headphones 

EXPECTED RESULT
volume stays at same level

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 42
KDE Plasma Version: 6.4.3
KDE Frameworks Version: 6.16.0
Qt Version: 6.9.1
Kernel Version: 6.15.7-200.fc42.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 9800X3D 8-Core Processor
Memory: 32 GiB of RAM (30.9 GiB usable)
Graphics Processor 1: NVIDIA GeForce RTX 4070 Ti SUPER (main)
Graphics Processor 2: AMD Radeon Graphics
Manufacturer: ASUS

ADDITIONAL INFORMATION
motherboard: rog crosshair x670e hero

Comment 1 Luan Vitor Simião Oliveira 2025-07-26 20:00:35 UTC

small correction, it still happens with software mixer, but when using it i just leave the hardware mixer volume at max so the change in volume is not perceivable

Comment 2 Luan Vitor Simião Oliveira 2025-08-04 18:40:42 UTC

could be a bug with the alsa-ucm-config for my board:
https://github.com/alsa-project/alsa-ucm-conf/issues/598

Comment 3 Nate Graham 2025-08-08 17:25:38 UTC

That sounds very, very likely.