I have also noted similar problem with 686 - it does not scale CPU on HP nw8240 (Pentium-M 2.13GHz). I have installed 386 kernel yesterday and CPU frequency scaling works (and system does not heat-up as it did before).
I am not sure if this bug was introduced with dapper-updates or if it was in 2.6.15.23, as I have used only 386 kernels during Dapper testing (and scaling worked all the time), while I got 686 just after Dapper release when I did clean install (but then also got updated kernel very soon after). -- kernel can't scale cpu frequency https://launchpad.net/bugs/36014 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
