Disabling alsa-utils in System - Administration - Services solves the
problem for me
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[jaunty] Sound muted after boot
https://bugs.launchpad.net/bugs/352732
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Same problem for me. I have DSL connection so I'm using pppoe. This way
there are two devices (ppp0 and eth0) which have same bandwitch, and
amount of data sent/received. In my opinion gnome-system-monitor shows
sum of both ( doubles the figures). There should be some option to
choose witch device
