There seems to be some problems with the tulip drivers in Dapper. Using the dmfe driver fixes this.
Add:
dmfe
to /etc/modules
Cut & paste into terminal:
sudo sh -c "echo dmfe >> /etc/modules"
and:
blacklist tulip
to /etc/modprobe.d/blacklist
Cut & paste into terminal:
sudo sh -c "echo blacklist tulip >> /etc/modprobe.d/blacklist"
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