I have a Lenovo T500 with the WiFi Link 5100 wireless miniPCIe card. I am running Ubuntu 10.04 LTS on it and lately, the whole laptop will freeze/hang solid. Watchdog NMIs do not reset the CPU. I believe that disabling the C-states in the CPU mitigates the problem (haven't seen it since I set the setting to a maximum state of C0). I also noticed that taking out this WiFi card prevents the problem from happening... so I am suspecting, just suspecting that there may be an issue with this card and C3 power states. I would love to get my hands on the errata for this chipset and any other technical (developers) documentation. How would I go about getting that?
Roger R. Cruz