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

Johannes Bittner linux-thinkpad@linux-thinkpad.org
Sat, 16 Jan 2010 17:54:05 +0100


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.