Comment # 9 on bug 904043 from Maciej Pilichowski

Something is wrong here, I installed OS 13.2 on another computer (default
install), then I added KDE 3.5 as well.

The sound system AFAIK is ALSA, and I tried Kmix from 3.5 and 4.1 (KDE), kamix,
xfce4-mixer, I am out of ideas what should I try more, and the same thing
happens. All of them show shifted volume.

For example, in alsamixer (console app), the volume is set to 50%, but in all
GUI mixers is shown as 75%.

(The real value is 50% judging by the actual audio output).