Created attachment 185561 [details] screencast showing the behavior SUMMARY When i play a YouTube video in Mozilla Firefox and pause, the application audio volume for Firefox drops to 61% (and sometimes even lower). When i increase the volume in Plasma Audio Application back to 100% and pause the video or skip the application audio returns to the lower volume. When I move the slider for YouTubes internal audio control to 0% and back to 100% the Plasma Application shows a scaled down volume and again maxes out at 61% when the YouTube volume is 100%. This does not happen in Chromium. I observed this behavior with and without the Plasma Firefox integration add-on. I think this happens only with videos that have the option "stable volume" but this still occurs with that option turned off. SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20251005 KDE Plasma Version: 6.4.5 KDE Frameworks Version: 6.18.0 Qt Version: 6.9.2 Kernel Version: 6.17.0-2-default (64-bit) Graphics Platform: Wayland
In the video, Firefox is open with a song playing from the Spotify channel On the right, the volume widget is open, showing the Applications tab. The volume slider is 100%. The cursor is used to start playback at a different point in the video with its timer slider. When unpaused, the volume slider in the widget drops to 79%, but the volume slider in the browser tab shows 100% Dragging the volume slider in the browser down and back to 100% changes the slider in the sound widget to 79% I can reproduce this in git-master. For me, the volume in the Audio Volume widget tops out at 94%, but otherwise the behavior is the same Generally, it seems there's different math happening between the sliders
This is almost certainly likely the browser or PipeWire doing it, not Plasma.
On my system I have pipewire, version: 1.4.2 felixxx, what version of pipewire do you have?
(In reply to TraceyC from comment #3) > On my system I have > > pipewire, version: 1.4.2 > > felixxx, what version of pipewire do you have? pipewire Compiled with libpipewire 1.4.8 Linked with libpipewire 1.4.8
(In reply to Nate Graham from comment #2) > This is almost certainly likely the browser or PipeWire doing it, not Plasma. Sorry, you are correct. This also happens with Gnome on Wayland.
I had a feeling. Probably best to report this at https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/, then!