On Do, 2013-08-01 at 13:58 +0000, Christopher Barrington-Leigh wrote:
> Thanks. Could be, but the fan control has never worked ideally under 
> GNU/Linux on this machine. Besides, shouldn't the processors be throttled 
> down based on the CPU temperature, even if I simply forced the fan to stay 
> slow?

I have no idea. But obviously there are some issues, and the CPU
temperature can go over the top. And slowing down the CPU to a near halt
doesn't make any sense either.
The fan control using thinkfan has been working fine for me, and when I
had the overheating issue even putting the fan into "disengaged"
wouldn't be able to cool the CPU.

>   No warranty left. I tried cleaning the fan with air, without opening 
> anything up. That obviously didn't make a difference.
>   I'm hesitant to open up this machine, but might.

That sucks :-/
It did look pretty complicated to do the fan replacement.

Unfortunately I have no idea why exactly the fan replacement helped. But
the fan seemed to be working fine when even when the laptop overheated.

Benjamin

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https://bugs.launchpad.net/bugs/1009731

Title:
  Since 12.04, CPU is overheating and powering off spontaneously under
  high computation load

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