Ubuntu throttling my FAH quad.

[orion456]

I have a quad that Ubuntu reports has a core temperature of 50c. After a short time of folding the temperature falls to 38c. Looking at FAHMON, production is significantly less than it should be. Looking at frequency monitor, it doesn't matter if I set it for 3.0 or 2.0 ghz, the temperatures remain the same. However changing it from ondemand to performance, briefly causes the temperature to rise again; then it falls back after 10 minutes or so.

I have check the heatsink, and it is cold, I reseated it, with no effect.

Any idea why Ubuntu would throttle a quad?

I may just install Windows so I can be sure what is happening. I don't know how trustworthy Ubuntu is when it comes to temperatures.

[thideras]

You can disable that service.

System<Administration<Services
Hit "unlock", type in your password
Disable "CPU Frequency manager"

Ubuntu will not throttle it and you can no longer change the frequency.

[ChasR]

Are you sure it's ubuntu and not bios related? Try changing the priority of the client to low and see what happens.

[Adak]

From our Ubuntu install guide:

13) Power Saving Settings for Folding:

A. Turn off four power saving settings, to keep your Ubuntu system folding.

B. In the BIOS: the ACPID (sometimes they have other "Green" or "power saving" options, as well. I turn them off and save that setting.)

C. In Ubuntu: System >> Preferences >> Power Management. Shows two slider controls, one is for the monitor, and the second one for the computer system. Slide the one for the computer system, to "Never".

D. System >> Service Settings >> CPU. Make sure to uncheck these two service boxes: Frequency Monitor and Power Management (ACPID).

As long as Ubuntu runs great w/o the updates, I don't update it very often.