Bug 504122 - External monitor connection raise the volume to 100% (no matter previous settings)
Summary: External monitor connection raise the volume to 100% (no matter previous sett...
Status: RESOLVED UPSTREAM
Alias: None
Product: plasmashell
Classification: Plasma
Component: Audio in general (other bugs)
Version First Reported In: 6.3.5
Platform: Neon Linux
: NOR major
Target Milestone: 1.0
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-05-12 21:13 UTC by tchiot.ludo
Modified: 2025-05-13 19:21 UTC (History)
2 users (show)

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Description tchiot.ludo 2025-05-12 21:13:32 UTC 
SUMMARY
In the past, plasma remember the last volume used for each sound output. 
Recently (6.3 as I remember), anytime I connect an external monitor, the volume is at 100% (no matter the previous value).

STEPS TO REPRODUCE
1. When I connect a external monitor (with HDMI sound), the volume is at 100%. 
2. I changed the volume to something like 20%
3. I disconnect the monitor
4. The sound is now affected to my laptop speaker at the previous volume level 
5. I reconnect the same monitor on the same port 
6. The volume is at 100%  

EXPECTED RESULT
In previous version of plasma (6.0 to 6.2 ?), the  sound volume was saved 

SOFTWARE/OS VERSIONS
- Tested on latest kubuntu 25.04 and latest ubuntu neon 
- On multiple laptop (intel 13 or ultra) 
- Reproduce directly on the live boot from usb, no need to install)
Comment 1 Nate Graham 2025-05-13 19:21:34 UTC 
I'm afraid this is a behavior that comes from deeper in the audio stack, especially if it's observed in multiple distros.