Red Hat Bugzilla – Bug 217182
speedstep centrino support not enabled in kernel
Last modified: 2008-08-02 19:40:33 EDT
Description of problem:
Since the cpu frequency control for Pentium-M is not enabled by default
in the FC6 kernel (CONFIG_X86_SPEEDSTEP_CENTRINO). There is no frequency
control and laptop always runs full speed.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
2. look for cpufreq in /sys (it's missing)
3. frequency control from gnome-power-manager etc can't work
It works if I build a upstream kernel and enable it.
Is this intentional or unintentional
$ grep SPEEDSTEP /boot/config-2.6.18-1.2849.fc6
Oh, I bet I know what this is. I bet you've been bitten by the "installer
installs a 586 kernel by default" bug.
See http://fedoraproject.org/wiki/Bugs/FC6Common and see if that's the problem.
If that still doesn't get you up and running, attach dmesg, and I'll poke at it
*** This bug has been marked as a duplicate of 211941 ***