View Full Version : [ubuntu] Thermal sensors / fan control on Dell Adamo

August 21st, 2010, 10:12 AM
There appear to be five thermal sensors in the Dell Adamo. Two are for the two CPU cores. What are the other three assigned to?

How can I tweak the fan control? The fan state is binary (on/off) so far. A finer control would be nice.


September 4th, 2010, 02:38 PM

Dell cannot tell me what the other 3 thermal sensors are for, because it is a "company secret". Yeah. Sure. Strange way to admit that they have no clue.

So the questions persist. Any ideas about the sensors or the fan control?

September 4th, 2010, 03:40 PM
Setting up fan control is relatively straightfoward - if a little involved - in Linux operating systems.

I would explain how to do everything step-wise but there are a few good guides out there, including this one: http://wiki.archlinux.org/index.php/Fan_Speed_Control. Follow the instructions contained in this thread and you should have fan control.

I suppose at this point I should echo the warning contained in the link. What you will be doing is fiddling with your PC's cooling, specifically turning off the CPU fan, albeit for a few seconds. You do this at your own risk.

As for what the other sensors are for... there can be, and often are temperature sensors just about everywhere in a PC - hard drives, northbridge, southbridge, graphics card, CPU cores etc... A question for you: how did you determine what sensors you have in your compute?

September 4th, 2010, 04:53 PM
A question for you: how did you determine what sensors you have in your compute?

sensors at the terminal if you have lm-sensors installed and have run
sensors-detect and answered yes to all of the questions..

September 5th, 2010, 09:15 AM
I know that jcolyn... I was asking he how he detected his sensors. If Ole knew about lm-sensors then he was only a commands away from having fan control and would probably have stumbled upon a web guide. So I was just curious as to whether Ole did use lm-sensors to divine how many temperature sensors he has or some other method. (Manual, psychic powers, other Dell users who said there are 5 sensors etc...)

September 5th, 2010, 08:39 PM
Aye, some activity here. :D Thanks for the replies.

The link about the fan-control looks very promising. I will try it the next few days. Seems I searched not thoroughly enough for this problem. My apologies.

As for the sensors: Psychic powers it is. Ok, not quite. I tried the "sensors" approach, among others. The two core-sensors are labeled as such. The other three are called meaningfully temp1/temp2/temp3. Besides that, I browsed
/sys/class/hwmon and
/sys/bus/i2c/devices to look for these sensors manually. This, however, did not reveal new information.