Re: Centrino CpuFreq (< 600 mhz)

[Dieter Jäger <dkjaeger@t-online.de>]

Joan Tur schrieb:

> Es Divendres 10 Desembre 2004 18:47, en Arnaud Fontaine va escriure:
> | >>>>> "Joan" == Joan Tur <jtur@wanadoo.es> writes:
> |
> |     Joan> Compiled, and boots fine, but I cannt see any change, minimum
> |     Joan> speed is still 600mhz at
> |     Joan> /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq 8-?
> |
> | Hello,
> |
> | I modified speedstep-centrino.c for my 1300Mhz Intel Pentium M, but like
> | you, i can't see any change despite i took a look at Intel
> | documentation. Someone has an idea ? I use cpufreqd, maybe there is an
> | another solution ?
> I'm using cpudyn, but both are based on info the system shows them 
> (sys & proc
> dirs)...  8-(
>
> |     Joan> Any idea?  Thanks ;)

The demon used should be of no effect, because all have to rely on the
sysfs entries, but it seems that the chipsets capabilities differ. Or
maybe some other kernel configs influence this. I have the following
options set which may have influence:

CONFIG_CPU_FREQ_TABLE=y
CONFIG_X86_ACPI_CPUFREQ=y
CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI=y
CONFIG_X86_PM_TIMER=y

I am using a debian kernel 2.6.8 on Centrino GM855/1600MHz Banias.


> |
> | Thanks
> | --
> | Arnaud Fontaine <arnaud@andesi.org> - http://www.andesi.org/ | GPG
> | Public Key available on pgp.mit.edu | Fingerprint: D792 B8A5 A567 B001
> | C342 2613 BDF2 A220 5E36 19D3
> |
> | --
> | panic("bad_user_access_length executed (not cool, dude)");
> |         2.0.38 /usr/src/linux/kernel/panic.c