Ubuntu 12.04; linux-kernel 3.2.0-27; alsa driver ver. 1.0.24 i have some problem with my HDA Intel ALC662 rev1. When i unmuting front mic in alsamixer, noise appear in my speakers in rear panel, but anyone devices is not plugged in in front panel. Besides in pulseaudio-control panel in hardware properties my device set to analog stereo duplex, and i can't set it to analog stereo output beacouse it's always set back to stereo duplex.
1 Answer
Setting the soundcard profile was limited in gnome-control-center for a simpler user experience (see bug #972554). This also affects the switching to Analog stereo
from Analog duplex stereo
. We can still do this with pavucontrol . This may also improve the noise you are experiencing when no device is plugged in the input jack.
From the log files attached to bug #1027570 we can see that we try to switch to the microphone port but fail. We may disable the automatic switching by commenting out the following line in /etc/pulse/default.pa
to look like this:
# load-module module-switch-on-port-available
This requires editing this file as root (e.g. by running gksu gedit /etc/pulse/default.pa
). To take effect we need to restart pulseaudio with
pulseaudio -k
If that does not help please remove the #
again to re-enable switching audio to a new audio port when it becomes available.
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there is another problem: when i plug the mic on the front panel, the settings of pulseaudio in input options, is shown attached to the front of the mic,but when I plug headphones to the front panel, mic in the input option begins to blink rapidly as if it connects and disconnects– TheSkifJul 21, 2012 at 19:12
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Try to see if you get any pulseaudio errors from running a pulseaudio log. You may also add any relevant errors to your question.– TakkatJul 21, 2012 at 20:42
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Looks like there is an issue with your front mic jack detection - it seems to constantly switch from unplugged to plugged and back. Unfortunately I have no good idea why that is - smells of a hardware issue (try to refix cables to your front panel?).– TakkatJul 22, 2012 at 8:48
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i tested the front panel in M$ Evil 7, there's works fine... but i'll rechecked my hardware. Thanks any way)– TheSkifJul 22, 2012 at 9:04