[driverloader] "No DHCPOFFERS received"

[Jonathan Baron]

This is probably not a linuxant problem, but maybe someone who
reads this will be able to help.

Everything was working fine until yesterday, when I updated cups
and xorg on Fedora Core 2, and connected to several new access
points to which I never connected before (but without disturbing
my dhclient.leases in /var/lib/dhcp, it seems).  Then all of a
sudden I have trouble getting a dhcp connection.  Ifconfig and
iwconfig look perfectly fine, but "route" gives no route, and
when I try to connect to anything I get the optimistic message
"temporary failure of name resolution."  Hah!  I _hope_ it is
temporary.  I installed the latest driverloader and that didn't
help.  Here is a piece of what happens when I run dhclient:

DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3
DHCPOFFER from 192.168.1.1
DHCPREQUEST on wlan0 to 255.255.255.255 port 67
DHCPNAK from 192.168.1.1
DHCPDISCOVER on sit0 to 255.255.255.255 port 67 interval 17
send_packet: Network is down
DHCPREQUEST on wlan0 to 255.255.255.255 port 67
DHCPNAK from 192.168.1.1
DHCPDISCOVER on lo to 255.255.255.255 port 67 interval 12
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on sit0 to 255.255.255.255 port 67 interval 3
send_packet: Network is down
DHCPOFFER from 192.168.1.1
DHCPREQUEST on wlan0 to 255.255.255.255 port 67
DHCPNAK from 192.168.1.1
No DHCPOFFERS received.
Unable to obtain a lease on first try.  Exiting.

It should be using wlan0, and it did when it used to work, even
though I was unable to get it NOT to try sit0.  Sit0 is not the
problem (or not the only problem).

192.168.1.1 is the Linksys BEFW1154 access point.

Jon
-- 
Jonathan Baron, Professor of Psychology, University of Pennsylvania
Home page: http://www.sas.upenn.edu/~baron