[gentoo-user] Intel iwl3945 problem

[John Moe]

I've recently rebuilt my laptop, and am having trouble getting the
wireless to work correctly.  My wireless is making an association with
my AP, but TCP/IP traffic doesn't seem to want to transmit over it; I
can't even ping my AP.  TCP/IP works fine on the ethernet adapter. 
Wireshark (without the ethernet connected) only shows traffic going out
the wireless card, not in, and another station on my home network is not
seeing the DHCP broadcasts.  My access point can see the MAC address of
the wireless card in my laptop.  I've tried to config the networking
with DHCP and static IPs, neither worked.

So, the wireless card appears to be working, and TCP/IP appears to be
working, but not together.  Does anyone have any idea what could cause
this?  I've previously had it working, however, I forgot to grab my
kernel config before I wiped the drive, only the /etc folder and my home
folder, so there's a good chance that I've done something differently in
the kernel config.

I've also tried copying out the kernel .config file, use make clean &&
make distclean && make mrproper on the kernel sources, copy the .config
back and run make && make modules_install, copy the new kernel and boot
it, but the problem persists.

I've attached relevant sections of /var/log/dmesg and /var/log/messages,
as well as my /etc/conf.d/net and kernel config.  Oh, and my emerge
--info, of course, for good measure.

Any help would be appreciated, I've been trying three nights in a row
now to get this working, it's driving me bonkers.  Knowing me, it's
going to be something small, minor and blindingly obvious...

John Moe