Intel WiFi 6000 on Ubuntu 10.04

A fresh install of Ubuntu 10.04 on a Dell Studio XPS 16 didn't want to enable its Intel Wireless WiFi Link 6000. Pressing the wifi touchkey didn't help.

Running rfkill list gave

0: phy0: Wireless LAN
             Soft blocked: yes
             Hard blocked: no

NetworkManager Applet reported wireless as disabled or device not ready.

I read that removing the dell_laptop kernel module might help, but it did no good in my case.

What finally did the trick for me was

sudo rfkill unblock wifi