[pulseaudio-tickets] [Bug 55438] New: channels aren't separated after switching between speakers and headphone (sometimes)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=55438

          Priority: medium
            Bug ID: 55438
                CC: lennart at poettering.net
          Assignee: pulseaudio-bugs at lists.freedesktop.org
           Summary: channels aren't separated after switching between
                    speakers and headphone (sometimes)
        QA Contact: pulseaudio-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: devkral at web.de
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: core
           Product: PulseAudio

Symptoms:
-music sounds strange
-playing front-left (gnome) is also heard on the right headphone speaker and
the other way around

Reproduction (speakers are connected, also the headphone):
1. plug out headphones, the sound should be hearable from the speakers
2. listen to music some time
3. plug in headphones
Now this problem appears sometimes (with the headphone, the speakers still
operate fine). The problem can't be solved by restarting pulseaudio.
The weirdest thing is that the problem disappears after a while.
Sorry that I don't have more information. I hope you can reproduce the problem.

my conclusion:
It seems as if the left and the right channel are mixed to a distorted mono
sound.
But this seems only to happen in headphones. Most probably it is a fault in the
headphone detection (the headphone itself is new and works fine) or a hardware
problem (broken driver?)

Technical data:
pulseaudio: git, build date: 22.9.2012
distro: archlinux
mainboard: GA-MA785GT-UD3H

Related bugs (seems so):
https://bugs.freedesktop.org/show_bug.cgi?id=53206

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