LinuxQuestions.org - Can't have this script working when launched from acpi event

Hi, I have a small script to mute sound . It works while launched from root but will fail when launched with acpi event.

Notification appears but sound will not be muted.

Any clue ?

The scipt :

Code:

#!/bin/bash



# get user running pulseaudio

user=$(ps aux | grep /usr/bin/pulse | grep -v grep | awk '{print $1}' | head -1)



# Get device name

device=$(su $user -c 'pactl list sinks' | grep -A1 RUNNING | grep Nom | sed -e s/Nom://g | sed 's/^[ \t]*//;s/[ \t]*$//' | awk -F ": " '{ print $2}')



# what to do

su $user -c 'pactl set-sink-mute '$device' toggle'



# notify action

su $user -c "DISPLAY=:0 /usr/bin/notify-send --expire-time=1000 'VOLUME MUTED' 'toggle'"