[ubuntu] Volume error

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http://ubuntuforums.org – Hi there! I have a small problem with Ubuntu 11.10. If I want to change the volume of my notebook speakers, there are only 3 levels: -muted -1st step: a very low level -all other levels are the same volume This problem doesn't affect the headphones. I tried to update the alsa drivers with a .sh script file I found on the internet but nothing changed. What can I do to fix this problem? Thank you. (Hardware)