Comment 6 for bug 368973

I have fixed the problem for my dell inspiron 9300 with the following script syncing the volumes of the master channel with those of the subwoofer and the headphones. I have added the script to the startup programs.

#!/bin/bash

while true
do
 A=`amixer sget 'Master' | grep "Front Left: Playback"`
 A=${A:23:2}
 amixer sset 'Master Mono' $A unmute
        amixer sset 'Headphone' $A unmute
 sleep 0.3
done