Can you read this page https://wiki.ubuntu.com/DebuggingSoundProblems in order
to see what may be your problem.
If this page can not solve your problem, please post a comment and set the
status of this bug report to new.
Can you give the result of cat /proc/asound/cards
** Changed in: linux (Ubuntu)
Sourcepackagename: None => linux
Status: New => Incomplete
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Video, Flash and system have no sound
https://bugs.launchpad.net/bugs/297168
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