dhcp problem on ethernet card

[Derek Broughton]

Luca Ferrari wrote:

> 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?

Check syslog - iirc, network-manager is invoking wpa-supplicant even on
wired interfaces.  If that's right, then it's not imo a problem directly of
network-manager (and certainly not knetworkmanager, which is just the GUI). 
It's a problem of network-manager's interaction with wpa-supplicant.  It
definitely does this with wireless interfaces, and I've never found a good
way to fix it (I just hibernate and resume, which always resets it).
-- 
derek