On Tue, 2013-05-21 at 18:15 +0200, Christian Iversen wrote: > 2) This particular USB sound card has no hardware volume controls, > except physical tuning knobs. When I use kmix to turn the volume > up/down, it indeed works, and as far as I can tell, it communicates with > PA to do so. (and it works just fine). > > However, the first time I play a source after PA has started, the PA > volume is at 100%. Which means that if I forget to turn the volume down > in kmix, my USB device becomes a Sound Blaster (mehehe..). > > Interestingly, kmix remembers that the volume is supposed to be around > ~30%, so when I turn it one step down (I have a hotkey for that), it > goes to ~25% immediately, instead of just the second-highest step. I > guess this is because kmix remembers where the volume was supposed to be > at, and not because of PA's as such. > > However, remembering and restoring the volume between reboots works fine > with all other sound cards, which have hardware mixers. What could be > causing these problems? Perhaps this? https://bugs.freedesktop.org/show_bug.cgi?id=55262 > Who is responsible for restoring volume in this > case - is it kmix, PA, or a combination? PA is responsible for all volume restoring. > Is this happening because the restore code does not want to enforce > software volume control? No, the restoring code doesn't distinguish between hw ans sw volume. -- Tanu
