[ltp] Adding more cooling to the T42p

[David A. Desrosiers]

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	I know you're going to think I'm nuts, but I need a way to get 
more heat off of the GPU and CPU than my T42p currently provides. I've 
been thinking along the lines of a low-profile copper heatsink, 
heatpipes or some other non-powered mechanism (something other than a 
glob of heat-paste).

	When I'm using OpenGL applications (i.e. my screensavers kick 
in while I'm away), my GPU heats up dramatically (73C+) and eventually 
the system just hard-locks and I have to forcibly shut it down.

	I can cause it to happen by running bzflag full screen for 
about 10 minutes, and I can watch the GPU and CPU temperatures rise 
very rapidly, until the whole machine just freezes on me.

	Another thing I've noticed, is that I can't set the 
'cooling_mode' to 'automatic'. Its always set to passive (and yes, I 
even hacked up acpi/thermal.c in the kernel to force that to active, 
no change).

	# echo 0x00 > > /proc/acpi/thermal_zone/THM0/cooling_mode

	# cat /proc/acpi/thermal_zone/THM0/cooling_mode 
	cooling mode:   passive

	Is there a trick there? Am I missing something? I'm running 
2.6.12.4 + software suspend patches (suspend2.net) + ibm-acpi v0.11, 
and I still can't get this to do what I want.

	I'd also like to figure out how to speed up the fan, if I 
could, but I've run into dead-ends there as well.

	I can't keep losing work due to these lockups, its really 
beginning to become a productivity-drain.

	Thanks in advance for any ideas/hints you might have. 



David A. Desrosiers
desrod@gnu-designs.com
http://gnu-designs.com


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