Comment 2 for bug 608372

Hi,

I suffered from same problem, and found the solution here :
http://ubuntu-virginia.ubuntuforums.org/showpost.php?p=7836980&postcount=3

Quoted:

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Adding those two lines to /etc/ppp/peers/wvdial worked perfectly!

defaultroute
replacedefaultroute

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Now pppd always set the default route correctly.

Hope it helps.

Thanks,
Harry