[Bug 582234] Re: Main sound mixer mutes automatically every few seconds

[Alistair Buxton]

Things I have found out:

"Independent HP" means independent headphones.

When the main output is getting muted, the headphone output is grey in
alsamixer. I assume this means that the card did not detect headphones
connected to the socket. Before the bug happens, the headphone output is
not grey. I assume that means the card thinks headphones are connected.

Under 2.6.32-22-generic the "Independent HP" switch is permanently set
to "off." Other than that, everything else is the same.

So it looks to me like there are multiple bugs here. First, the card
cannot accurately tell when headphones are plugged in. Secondly, when it
thinks headphones are not plugged, the driver incorrectly mutes the
speaker output, instead of the headphone output. And thirdly, the
"Independent HP" switch does not work in 2.6.32.

-- 
Main sound mixer mutes automatically every few seconds
https://bugs.launchpad.net/bugs/582234
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