This really should be 2 bug reports one for your sound issue another for the network issue. Nonetheless, do you have the following package installed bcm43xx-fwcutter?
** Changed in: Ubuntu
Sourcepackagename: None => alsa-driver
Assignee: (unassigned) => Brian Murray
Status: Unconfirmed => Needs Info
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Distored headphones
https://launchpad.net/bugs/92719
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