[PLUG] Urgent! Lost network connection after upgrade

[jgw at sdf.org]

Hi,
I had pretty much the same experience this morning.  It seems to be related
to a change in the way Network-Manager does its thing.  After 6+ reboots
my issue resolved itself.  I did find something on I think ubuntu forums
that suggested paring down /etc/network/interfaces to the following lines:

  auto lo
  iface lo inet loopback

and rebooting.  If you look through some of the system logs (think it was
the dbus logs) you might see the confusion as Network Manager tries and
fails.  Network Manager is a freedesktop.org product so the issue likely
happens to many distros.

Good luck...

Jeff