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I am using Backtrack 4 and loving it. But the one problem is the audio volume slider of the gnome notification bar is not working. Hence I have to depend on either that of VLC's audio volume slider or on the speaker's hardware.

How can I fix this?

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The alsamixer is working nicely – Bijaya Bidari Mar 6 '13 at 4:44
up vote 0 down vote accepted

This works on Backtrack 5 R3 and may work on Backtrack 4.

Go to System » Preferences » Startup Applications

Make sure you’re in the tab ‘Startup programs’. Click on "Add". Then enter the following

  • Name: Pulseaudio daemon
  • Command: /usr/bin/pulseaudio
  • Comment: Start the sound daemon

Now logout, then login again. It's normal that sound doesn't work on Ubuntu 10.04 under root.

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Recently I have upgraded to Ubuntu 12.04 and the slider is working in it. – Bijaya Bidari Apr 6 '13 at 9:04

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