Comment 9 for bug 294667

Similar problem for me.

stetzen@stetzen-laptop:~$ sudo modprobe iwl3945
FATAL: Error inserting iwl3945 (/lib/modules/2.6.27-7-generic/updates/iwl3945.ko): Unknown symbol in module, or unknown parameter (see dmesg)

stetzen@stetzen-laptop:~$ dmesg | grep iwl
[ 17.901093] iwl3945: Unknown symbol lbm_cw_print_ssid
[ 646.163898] iwl3945: Unknown symbol lbm_cw_print_ssid
[ 703.647053] iwl3945: Unknown symbol lbm_cw_print_ssid
[ 777.757552] iwl3945: Unknown symbol lbm_cw_print_ssid

stetzen@stetzen-laptop:~$ lspci | grep Wire
03:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)

stetzen@stetzen-laptop:~$ uname -a
Linux stetzen-laptop 2.6.27-7-generic #1 SMP Tue Nov 4 19:33:20 UTC 2008 i686 GNU/Linux

stetzen@stetzen-laptop:~$ dpkg -l | grep linux-backport
ii linux-backports-modules-2.6.27-7-generic 2.6.27-7.6 Ubuntu supplied Linux modules for version 2.6.27 on x86
ii linux-backports-modules-intrepid 2.6.27.7.11 Generic Linux backported drivers.
ii linux-backports-modules-intrepid-generic 2.6.27.7.11 Backported drivers for generic kernel image

It is a Lenovo R61i laptop, wireless does not work at all.