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.
Setting the soundcard profile was limited in gnome-control-center for a simpler user experience (see bug #972554). This also affects the switching to
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
This requires editing this file as root (e.g. by running
If that does not help please remove the