[ltp] CPU temperature at 80C and above , despite fan running at maximum speed ( Thinkpad Z61m)

Damon Lynch linux-thinkpad@linux-thinkpad.org
Sat, 16 Jan 2010 13:08:47 -0600


If it gets too hot, it will shut itself down. Gnome is rather nice -- it 
will give you a warning that this will happen. I don't know about other 
desktop environments.

The only reason I know this is because my previous notebook (a Sony with 
a Core 2 Duo) had a failing fan, and the CPU temperatures would get up 
to 100 degress C before it shut down.  When the fan was eventually 
replaced (after some months, a long story) the technician said the 
thermal paste had essentially disappeared. That machine would idle at 
about 55 degree C.

If you have access to the fan after lifting off the keyboard, a blower 
of the type that is used to clean cameras and lenses can be very useful 
indeed. I was able to clean out a substantial amount of dust that way.  
I don't know if blowing in with the keyboard on will have any bad 
affect. Maybe if it has  a front and side air vent you'll be fine -- I 
don't know.


On 01/16/2010 10:54 AM, Johannes Bittner wrote:
> Hi,
> My CPU reaches temperatures of more than 80C, despite my fan running
> at its highest speed (~3200 rpm, level 7 in thinkpad-acpi). To reach
> this temperature, I simply ran two processes on my notebook which do
> an infinite loop.
> Is this normal? I stopped the test at 80C because I didn't want to
> damage my notebook (the temperature didn't stop rising at all). Is it
> possible that a dirty fan could cause this behaviour, and how do I
> clean it?
> It's a Thinkpad Z61m 9450-3HG, the CPU is a Intel Core Duo T2500. By
> the way, the CPU temperature right now (mostly idle) is 57C.
> Thanks,
> Johannes