Good installation howto for ubuntu linux on the lenovo thinkpad t400.

working out of box:
What works out of the box?

Wireless with iwlagn driver (Intel WiFi Link 5100/5300 WLAN controller)
G mode + WEP and WPA2 PSK (If you have the ThinkPad 11b/g Wireless LAN mini PCI Express Adapter III (Aetheros Chipset), see below!)
with status LED and everything!
Bluetooth
Even with Bluetooth Laser Mouse
Bluetooth can only be toggled together with WLAN on and off, to add a bluetooth-only-toggle (Fn+F6) that doesn't affect WLAN take a look here.
Intel Gigabit Ethernet Controller

Installation of Gentoo Linux on the Lenovo thinkpad t400, t500 and w500 w700

This article is dedicated to getting hardware specific to the Lenovo ThinkPad T400, T500 and W500 with switchable graphics, and the W700 working smoothly on Gentoo Linux.