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From: Kyle Moffett <mrmacman_g4@mac.com>
Subject: Re: 2.6.21-rc5: Thinkpad X60 gets critical thermal shutdowns
Date: Sun, 1 Apr 2007 14:57:57 -0400
To: Jeremy Fitzhardinge <jeremy@goop.org>
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On Mar 31, 2007, at 02:36:08, Jeremy Fitzhardinge wrote:
> When I run 2.6.21-rc5 + Andi's x86 patches + paravirt_ops patches,  
> I've been getting my machine shut down with critical thermal  
> shutdown messages:
>
> Mar 30 23:19:03 localhost kernel: ACPI: Critical trip point
> Mar 30 23:19:03 localhost kernel: Critical temperature reached (128  
> C), shutting down.
> Mar 30 23:19:03 localhost kernel: Critical temperature reached (128  
> C), shutting down.
> Mar 30 23:19:03 localhost shutdown[19417]: shutting down for system  
> halt
>
> and the machine does feel pretty hot.  Interestingly, when the  
> machine reboots, the fan spins up to a noticeably higher speed, so  
> it seems that maybe something is getting fan speed control wrong.

Well, 128C is more than hot enough to boil water and well above the  
thermal tolerances of most CPUs, so I would imagine that were your  
CPU actually that hot it wouldn't be capable of printing the  
"Critical temperature reached" messages, let alone properly rebooting.

Cheers,
Kyle Moffett