oops, I don't read Sergey comment.
Sorry
I close this
** Changed in: alsa-driver (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1047600
Title:
Speakers don't automute when headphones plugged in
Status in elementary OS:
Won't Fix
Status in “alsa-driver” package in Ubuntu:
Invalid
Bug description:
This problem is inherited from Ubuntu 12.04, it wasn't present in
11.10 and seems to be fixed in the beta for 12.10, though I can't find
any triaged versions of the bug to explain the fix.
It appears to be an issue with ALSA and Realtek sound cards where ALSA
doesn't automute the speakers when something is plugged into the
headphone jack, instead sound comes out of both. If the headphones are
plugged in and then the computer is suspended, coming out of the
suspension will make the speakers mute and sound only come out of the
headphones, though once you remove the headphones, sound does not
resume coming out of the speakers. So it's either a failure to detect
the change or a failure to do anything about the change.
If this problem is in ALSA, it might be wise to backport the version
of ALSA from 12.10 into Luna, or users, myself included, will have to
suffer from this.
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