The problem with my HP NC6120 is that it kind of freezes running Ubuntu 9.10. There is no processor activity and plenty of free RAM but the load goes through the roof. I've first experienced when I upgraded from Ubuntu 9.04 (this distro works fine) and then I tried a clean install. Still the same problem. Also tried the test version of Ubuntu 10.04, still the same deal.
NC6120 Intel chipset, 1GB RAM, 1,86 GHz processor