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I have the similar problem as some people who have already submitted
bugs, I'm unsure if this is actually a dupe or not (better to be safe?).
I just got a Gateway P-6860FX laptop. The volume change buttons effect
PCM, instead of master. The volume goes up and down and I successfully
get a box showing the volume. In my case, this seems to be good because
if I mute or change the volume to the master channel, I continue to hear
sound at whatever PCM's volume level is set at.
My mute button seems to have no effect. When I hit the mute button, I
do get a "mute on" and "mute off" message. The mixer window does NOT
show any channel being muted.
I started off by putting Hardy on this laptop, so I have no idea if the
bug has been recently introduced or not. I had these problems right ouf
of the box.
Description: Ubuntu 8.04
Release: 8.04
** Affects: gnome-control-center (Ubuntu)
Importance: Undecided
Status: Fix Released
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Some sound buttons control PCM, changing master volumes has no effect
https://bugs.edge.launchpad.net/bugs/239886
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