microphone muted by alsamixer capture mix

[doru001]

I remember that two months ago I could record my microphone through alsamixer's Capture Mix channel. However, now this does mute my microphone in the gnome-volume-control Input tab.

The only change I made, besides regular updates, was to create an executable /etc/pm/sleep.d/50alsa containing:

case "$1" in
        hibernate|suspend)
                # Stopping is not required
                ;;
        thaw|resume)
                /sbin/alsa force-reload
                ;;
        *) exit $NA
                ;;
esac

to enable for sound after hibernation.

When I unmute the microphone in gnome-volume-control, alsamixer's Capture changes from Mix to Mic. When I change alsamixer's Capture from Mic to Mix, the microphone is muted in gnome-volume-control. How could this happen?

Distribution: Ubuntu 10.04 lts Lucid Desktop upgraded from 8.04 and using lubuntu on top of it. Kernel: 2.6.32-41-generic.