No sound after update - Ubuntu 7.1 AMD 64

Thu Dec 20 23:07:26 UTC 2007

Use the sound mixer and turn up the volume.
  _____  

From: Tran Huu Dat [mailto:sothacom at gmail.com]
To: ubuntu-users at lists.ubuntu.com
Sent: Wed, 19 Dec 2007 20:41:11 -0900
Subject: No sound after update - Ubuntu 7.1 AMD 64

I'm using Ubuntu 7.1 AMD64. After updates, no sound in ubuntu. The icon
  speaker on Panel change to same mute. Please help me. (My English not
  good, i hope you can understand me)

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