[ltp] Re: [T410s] Fan running constantly

Richard Neill linux-thinkpad@linux-thinkpad.org
Thu, 19 May 2011 01:00:15 +0100

On 18/05/11 20:45, Daniel Näslund wrote:
> On Wed, May 18, 2011 at 2:37 PM, Stefan Monnier
> <monnier@iro.umontreal.ca>  wrote:
>>> When googling, I find several forum posts describing the T410s fan as
>>> noisy when running Linux but it appears as  a non-issue for Windows
>>> users.  Has anyone found a workaround? I've found [2] but I'm resistant

You can use tpfand / tpfan-admin to control the fan trip points. It's 
certainly safe to run up to 75 degrees (and possibly 95 if you feel like 
risking it) - as long as you run the machine on a table. The need to 
stay below about 45 is to protect your legs (low temperature burns), not 
the CPU.  [Ensure the battery doesn't get hot though: a failed CPU is 
just inconvenient; an exploding LiPo is not so good.]

You might also consider re-doing the heatsink thermal compound, and 
checking the GPU cooling is good. (On my T60, the CPU idles at 45, but 
the GPU idles at 70, because the heatsink design for the GPU is very 
faulty; I'm shortly going to modify this).

Also, use powertop - it gives helpful advice on what is consuming power. 
It should be possible to get the machine to idle on  < 10 W.