toshiba cpu speed

post_break · 07-27-2006, 10:27 AM

Ok so my 3.4hz cpu runs at full speed if there is flash on a website or there is anything taxing. Windows just pwns this system in battery life due to this. Currently Im running ubuntu dapper drake with xgl and it idles comfortably at 1.87ghz which I would like it to stay there no matter what. Is there a file I can edit to determine the max speed my processor can go?

I know there is this "cat /proc/cpuinfo" but I dont know if that is editable. Please help, this has been the main factor in my not using linux...

konsolebox · 07-28-2006, 08:03 PM

what processor are you using?

if you can compile the kernel with "cpu frequency scaling" enabled in the power management section and have sysfs enabled in /sys, you can look at /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies for the available frequencies you have.

that's only one. i bet there's still more other ways.

post_break · 07-28-2006, 08:42 PM

Quote:

Originally Posted by konsolebox

what processor are you using?

if you can compile the kernel with "cpu frequency scaling" enabled in the power management section and have sysfs enabled in /sys, you can look at /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies for the available frequencies you have.

that's only one. i bet there's still more other ways.

Its a "presshot" core mobile P4. It scales to 1.87 but I would like it to stay there ALL the time or at least remove the highest speed from the options.

"ryan@laptop:/sys/devices/system/cpu/cpu0/cpufreq$ cat scaling_available_frequencies
3333000 2933000 2667000 2400000 2133000 1867000"

Can I just nano this file and remove 3333000 from this or will that cause big problems upon boot up? Thanks for the help so far.

konsolebox · 07-28-2006, 08:52 PM

if you have the userspace governor (recompile the kernel if you don't), when you do:

Code:

echo "userspace" > scaling_governor

the file scaling_setspeed should appear.

you can echo the custom frequency you wanted (only use the valid values from scaling_available_frequencies) to this file and it will set your cpu speed.

you can set this as a batch of commands in the local startup if you want to always have that speed.