I upgraded my Lenovo Thinkpad X300 to Ubuntu 8.10 Intrepid Ibex today. My original installation notes for Hardy are here.
After the upgrade, sound was working without compiling an ALSA snapshot by hand. Also, 3G connections worked straight out of the NetworkManager applet, which is very nice. But WiFi was broken, as the nm-applet refused to connect to any SSID, encrypted or open. That seemed to be due to myself using the development networkmanager packages with Hardy. They were not upgraded correctly. The remedy was to remove all network-manager packages and reinstall them. Continue reading Ubuntu 8.10 on Thinkpad X300