I upgraded my Asus G1 which previously had an Intel 3945ABG mini PCIe wireless adapter, to an Intel 5100AGN. The wireless works fine, in both Ubuntu 12.04 using the iwlwifi driver and in Windows XP using the latest Intel driver for this card. The problem is that I am now getting system freezes at random, whereas my system used to be stable in both OSes before.
The first freeze happened within an hour of the wifi card upgrade, but sometimes it can go for hours or a day without any problem. When things freeze up, the mouse, and keyboard are totally unresponsive, even with Alt+Sys Rq + (r e i s u b), and I must force a shutdown by holding down the power button. Aside from the freezing, I have not observed any problems, and the wireless seems to work fine.
Although I do not know for sure that it is an issue with the wireless adapter, I did not have this problem before, it seems to be OS and driver independent, and only showed up after the upgrade. Asus does not have a hardware blacklist/whitelist BIOS, so that's not it. Are there any solutions? What N wireless adapters are known to work well with Asus G1?