Also having this problem in Ubuntu 8.04, kernel 2.6.27-7-generic #1 SMP. I have been using the intel video as a consequence.
I know this is off topic, but the wireless card is a quick fix. In ubuntu, just do this:
sudo aptitude install build-essential
tar xzvf iwlwifi*
sudo cp iwlwifi*/iwlwifi-5000-ucode-5.4.A.11/iwlwifi-5000-1.ucode /lib/firmware
tar xjvf compat-wireless-old.tar
#A file will open. Search for the string CONFIG_IWL4965_HT=y. Directly after that string, on a new line, add this string:
# Code: CONFIG_IWL5000=y
sudo make install
sudo make unload
sudo make load
Unfortunately most of the ACPI is not working for me, ie, cannot restart, hibernate, or suspend. Additionally, some Fn keys do not work.