Re: Mobile Intel Pentium(R) 4 - M CPU 2.60GHz - kernel 2.6.3

Zwane Mwaikambo
2004-02-27T13:14:27Z

On Fri, 27 Feb 2004, Bob Dobbs wrote:

> I am currently running kernel 2.6.3 on my Dell Inspiron 8500 laptop.
> I disabled all the ACPI and APM options in the kernel.
>
> I have upgraded my bios
> I have tried from kernel 2.4.23 up to mm and love-sources and my current kernel 2.6.3.
>
> What happens is during heavy loads my cpu drops from 2.60GHz down to
> 1.20GHz, this happens for a few minutes, say 5 - 10 at the most. But
> performance while running a game, puts the game into slow motion. (Which
> is weird because 1.20GHz should be more than enough to run all of the
> games I currently have). I have read up on the documentation in
> /usr/src/linux/Documentation, under the "power" and "cpu-freq" but after
> disabling ACPI and such, those options do not seem to work anymore.

Just to clarify, the cpu-freq driver does not operate normally when ACPI
is disabled? Which cpu-freq driver are you using?

> I have also tried running a program called "cpufreqd" which launches at
> boot time, but once again without ACPI enabled in the kernel this seems
> not to work either. Also /sys/devices/system/cpu/cpu0/cpufreq/ has the
> following files.

Out of interest do you have CONFIG_X86_MCE_P4THERMAL enabled?

> cpuinfo_min_freq
> cpuinfo_max_freq
> scaling_min_freq
> scaling_max_freq
>
> I even tried to echo the options at bootup:
>
> echo 2600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq &
> echo 2000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq &
>
> I tried to make those files set at: 2.00GHz min and 2.60GHz max, but
> something changes them right back to 1.20GHZ no matter what I do.
>
> I am sure I am missing something, but atm I am totally lost.. and I
> could surely be doing everything wrong to begin with... that is why I am
> asking for help.
>
> Is there a patch or anything to force the cpu to run at 2.60GHz all the time?