[ltp] Thinkpad X30, 2.6.21-rc5, and the hdaps module.

[Andrew J. Barr]

Steve Thompson wrote:
>> I think the 200MHz frequency (and anything below 600MHz) that Windows 
>> (and evidently the BIOS) reports is the result of SpeedStep + processor 
>> C-states. This is at least the case for the Pentium-M in my R51. You 
>> will see this number if you use gkrellm-x86info, for instance.
> 
> I blew away the entire Windows install so I can't verify this.  Yet, the
> mp3 playback under those conditions is consistent with a system running at
> 200MHz that reports that it is running at 700+Mhz.

Check your cpufreq settings. It's possible that you are being held at 
the low end of your possible clock speeds--perhaps by a max freq setting 
or by the 'powersave' governor. gnome-power-manager should take care of 
this in recent versions, or alternatively you can install a daemon such 
as powernowd (not related to the AMD processor technology) or cpufreqd. 
powernowd is an install-and-go kind of program, whereas cpufreqd is 
highly configurable.

ACPI C-states are not configurable by the user as far as I know, the 
kernel and the firmware handle this themselves.

Andrew