I have exactly the same problem.. under edgy (2.6.17-11-generic) and under feisty (2.6.20-11-generic).
I know the 'powernow-k8' module used to successfully load on this same CPU/Motherboard/BIOS (Athlon64 3000+ / MSI K8T Neo2 FIR) in an older version of Ubuntu.. (I'm guessing that was breezy, but not 100% sure).. so it's definitely a regression. -- CPU frequency scaling isnt workin https://launchpad.net/bugs/44699 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs