Comment 23 for bug 36014

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).