dhcp problem on ethernet card

[Luca Ferrari]

On Monday 14 January 2008 Luca Ferrari's cat, walking on the keyboard, wrote:
> Hi,
> I'm using kubuntu 7.04 but my dhcp client is no more working. This is what
> happens: the computer boots, then the knetworkmanager keep the gear running
> but no address is provided to my host. After a few minutes, if I manually
> configure the ethernet card I'm able to use the network, thus the card is
> running.

After a while I discovered it seems to be a problem of knetworkmanager. If I 
keep it down, then the dhcp on the ethernet card works fine, and the address 
given is stable (i.e., it does not change). Anyone else experiencing this 
problem? Any idea about how to solve it?

Thanks,
Luca