SUMMARY Hey, I was testing out plasma 6.1 beta on Arch and I noticed that when you raise the maximum volume and then turn it up to max. It seems to top off a 153% now instead of the usual 150%. Just seemed kinda odd to have that extra 3%. STEPS TO REPRODUCE 1. Open the plasma volume applet. 2. Click the raise maximum volume toggle. 3. Turn volume up to max. OBSERVED RESULT Max volume is 153% EXPECTED RESULT Max Volume should be 150% SOFTWARE/OS VERSIONS Operating System: EndeavourOS KDE Plasma Version: 6.0.90 KDE Frameworks Version: 6.2.0 Qt Version: 6.7.1 Kernel Version: 6.9.1-zen1-2-zen (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 5800X 8-Core Processor Memory: 62.7 GiB of RAM Graphics Processor: NVIDIA GeForce RTX 3080/PCIe/SSE2 Manufacturer: Micro-Star International Co., Ltd. Product Name: MS-7C95 System Version: 1.0
Can confirm the issue. Operating System: Arch Linux KDE Plasma Version: 6.0.90 KDE Frameworks Version: 6.2.0 Qt Version: 6.7.1 Kernel Version: 6.9.2-arch1-1 (64-bit) Graphics Platform: Wayland
I cannot reproduce this issue when I raise the volume using my keyboard's volume up key. Some questions: 1. How are you raising the volume; via that method, or a different one? 2. Can you attach a screen recording that shows the issue happening? 3. Can you attach a file with the contents of `pactl list`?
(In reply to Nate Graham from comment #2) > I cannot reproduce this issue when I raise the volume using my keyboard's > volume up key. Some questions: > 1. How are you raising the volume; via that method, or a different one? > 2. Can you attach a screen recording that shows the issue happening? > 3. Can you attach a file with the contents of `pactl list`? I'm raising it using the volume slider in the panel applet. I'll try to provide the the other info when I return home.
Aha! I can reproduce the issue when setting the volume via the slider. So no need for the rest of that information I requested, since I can now reproduce it myself.
Created attachment 170228 [details] Video of the slider going up to 153% For me it also does that only using the slider. That does not happen when using keyboard shortcut.
Also note that this value is provided by pulseaudio as the recomended maximum volumen presented to the user, which is set to +11dB (increment from the normal 0dB or 100%). This correspond to 153%, which is so close to 150% that might feel weird or a bug, but it is the result of converting between log and linear units. See: https://www.freedesktop.org/software/pulseaudio/doxygen/volume_8h.html#a353b44010677b005abd390af732eb86e So this would be technically an upstream issue, but not a bug. Now, as a "consumer" of the library, we could fix the value to exactly 150% in PulseAudioQt, disregarding the upstream recommendation.
So the problem here is that maximum extended volume / maximum normal volume no longer equals a nice clean 1.5 like it used to: Maximum extended volume: 99957 Maximum normal volume: 65536 Divide one by the other and you get 1.525. Multiply that by 100 to get a percent and then round it, and you've got a UI that says 153%.
Consulted with Ismael on this. The change that caused this to happen in Plasma 6 is that we moved to getting the data from PulseAudioQt instead of a locally vendored copy. Using the upstream volume values gives us a maximum value that's 153% due to aforementioned differences linear (percentage) and logarithmic (decibel) units.
A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-pa/-/merge_requests/267
Git commit 95abf2bd2df5e674c78960579de5684ee2dad5f3 by Ismael Asensio. Committed on 11/06/2024 at 18:13. Pushed by iasensio into branch 'master'. Set Maximum Volume to 150% The maximum UI value suggested by PulseAudio (PA_VOLUME_UI_MAX) results in 153% (11dB), which can be seen (and reported) as a bug See: https://www.freedesktop.org/software/pulseaudio/doxygen/volume_8h.html FIXED-IN: 6.1 M +3 -1 src/qml/plugin.cpp https://invent.kde.org/plasma/plasma-pa/-/commit/95abf2bd2df5e674c78960579de5684ee2dad5f3
Git commit 383f275e06ce5b5d20c9dff3976be24fe986582d by Ismael Asensio. Committed on 11/06/2024 at 18:16. Pushed by iasensio into branch 'Plasma/6.1'. Set Maximum Volume to 150% The maximum UI value suggested by PulseAudio (PA_VOLUME_UI_MAX) results in 153% (11dB), which can be seen (and reported) as a bug See: https://www.freedesktop.org/software/pulseaudio/doxygen/volume_8h.html FIXED-IN: 6.1 (cherry picked from commit 95abf2bd2df5e674c78960579de5684ee2dad5f3) Co-authored-by: Ismael Asensio <isma.af@gmail.com> M +3 -1 src/qml/plugin.cpp https://invent.kde.org/plasma/plasma-pa/-/commit/383f275e06ce5b5d20c9dff3976be24fe986582d