Comment 17 for bug 151877

I have the same issue, only with gutsy, on multiple computers (mainly DELLs but also an HP), all with an intel sound card (snd_hda_intel module) ...

Trying to describe the problem in other words: Sliding the volume bar from, say, the bottom to the top produces, instead
of a steady volume increase: volume increase, mute, volume increase, volume decrease, mute, volume increase.

Sliding volume bars in the gnome-volume-control windows gives the same weirdness, sometimes also unlocking the
left and right channels and setting one of them to a different random value.

If i "strace" the mixer applet process, I cannot reproduce the problem, which somehow makes me think of a timing related race.