Fan not working. Hardware problem, or is it just quiet, or is it Linux and DSDT? How can I know? [ Edited ]

[gasull]

Hi.

The fan in my Lenovo 3000 V100 doesn't seem to work.

- On Linux (Ubuntu 10.04) the laptop overheats sometimes to point of shutting down.  

- I don't use Windows, but I tried a bootable Windows CD and it seems the fan isn't working.  I can't hear it and it doesn't seem that any air is coming out of the fan.  I tried with Thinkpad Fan Controller 0.20 and manually setting the fan speed to the maximum.  I noticed no difference.

- When starting the computer I can hear the hard drive the first few seconds, but I don't think I hear the fan so I don't think it's starting at all.  Os is it so quiet?

How can I be sure it is a hardware problem?

I ask this because a many laptops have problems in Linux with DSDT (a file from the BIOS) than only work on Windows.  And I have had this problem in the past.  (I tried compiling the Linux kernel with a DSDT I fixed myself and posted in this forum 2 years ago, but this time it didn't work).

[Duck3]

I would think if you entered the bios setup on boot,
and fan does not run, it may be hardware.
Just let it sit (in bios) and see if it comes on.

[rzrfreefr]

are you able to monitor fan RPM ?

if not how comes this is not availble to read that info?

may this help :

http://forums.lenovo.com/t5/Linux-Discussion/reading-fan-status-under-linux/td-p/115368/page/2