HEL80 - power management under linux.

I had a quick look through the other threads, but I figured none of them really dealt with what I was interested in, so rather than taking them off-topic, I chose to make a new thread. If that was silly of me, do say so.

On to my issue. I just installed Ubuntu and everything is working perfectly fine so far. However, I find the options available to me in the built-in power management software to be much too "nooby". I ran RMClock under WinXP to be able to underclock etc, but what corresponding software is available for Linux, and does anyone have any experiences with said software, be it good or bad?

Thanks,

Nicke.

 

Thats actually not something I've looked into yet unfortunately (can't yet stick to linux 100% of the time), but I'd also be interested in the answer.

 

Well, seems I'll be helping out a bit on my own topic. This is what I've found so far:

Enabling power saving / automatic frequency scaling:

http://ubuntuguide.org/wiki/Ubuntu_...27s_Power_Saving.2FFrequency_Scaling_features

I tested it out and both my cores are now running at 1.0Ghz, using the "ondemand" governor, which is also recommended for laptops in the linked article. Using the same article, I tried to get temp sensors working but to no avail.

So, old questions remain and new ones pop up. Can anyone, A) recommend software to adjust voltages and B) share their experiences on getting sensors to work.

Thanks,

Nicke

 

I remember fussing around with something called K8 on an older P3 notebook... the software enabled a bit of information like temps to come from the CPU, as well as being able to set the thermostat for the fan (speed @ given temp also) Might be worth looking into....

I'm not in Ubuntu right now, but I could have sworn my system already scaled out of the box? (should be able to add the cpu applet by right clicking on a gnome bar) Maybe that only does the straight up 1.0/MAX and I've just not noticed?( I know it hits atleast 1.0 and max for my processor.. has for the last 3 version of ubuntu) Anyways, thanks for sharing your experiences as you come across info.

 

You can only adjust the voltages by recompiling your kernel and changing some tables, I believe. They're hard-coded into the software, as a parallel to the clock frequency. It sets the voltages to what Intel recommends for each speed step. The clock frequency adjustment still works as you notice, though, which will save a lot of power itself.