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[Solved] Enabling CPU throttling on E5700 CPU

Posted: 2. Jul 2011, 13:40
by toothandnail
I've just installed Salix (13.37, 64-bit) for a friend. The machine uses an MSI motherboard, 4 GB of RAM, and an Intel E5700 CPU. Its amazing to see how much faster Slaix is than OpenSUSE (also running XFCE). Ken is very pleased with it. A couple of problems though.....

I have (so far) been unable to enable CPU throttling for the system. Checking the Intel specs, the E5700 supports Enhanced Speedstep (same as my T61). I've manually loaded the acpi-cpufreq module, and cpufreq_ondemand, but the system is still running at the full 3 GHz even when idling.

On my laptop, I didn't need to do anything - cpu throttling was enabled directly after installation. So, can anyone tell me what else is necessary on the desktop machine to enable throttling? I've had a look at the Wiki and done a few searches without finding anything that looks relevant.

The machine has another problem, but I'll start a separate thread for that....

Paul.

Re: Enabling CPU throttling on E5700 CPU

Posted: 2. Jul 2011, 14:22
by thenktor
Open /etc/rc.d/rc.modules and search for CPUFREQ. Set it to "on" and check if it works after reboot.

Re: Enabling CPU throttling on E5700 CPU

Posted: 2. Jul 2011, 14:37
by toothandnail
thenktor wrote:Open /etc/rc.d/rc.modules and search for CPUFREQ. Set it to "on" and check if it works after reboot.
Thanks Thenktor. I'll give that a try.

Paul.

Re: Enabling CPU throttling on E5700 CPU

Posted: 9. Jul 2011, 12:16
by toothandnail
thenktor wrote:Open /etc/rc.d/rc.modules and search for CPUFREQ. Set it to "on" and check if it works after reboot.
Just to confirm, changing CPUFREQ to 'on' in /etc/rc.d/rc.modules solved the problem - the CPU now switches between 3.0 GHz and 1.2GHZ without problems.

Paul.