Run OFW heat spreader test

Jerry Vonau jvonau at
Mon Jan 23 00:16:42 EST 2012

On Mon, 2012-01-23 at 00:02 -0500, Richard A. Smith wrote:
> On 01/22/2012 09:00 PM, Sridhar Dhanapalan wrote:
>  > We are using a custom olpc.fth to present a boot menu so that users
>  > can easily flash their XOs. As a precaution, we run a lid switches
>  > test before the OS installation begins. Some of our XOs have older,
>  > less effective heat spreaders, and we would like to catch these before
>  > they get burnt-out by the flashing process.
> The CPU has an internal thermal shutdown.  It won't burn out.  I run 
> 1.5's without heat spreaders all the time.  The reason you want to catch 
> them is that fs-update will hang.
>  > The automatic lid switches test is confusing some teachers. Ideally we
>  > only want to run the heat spreader test part of it, so that the test
>  > is transparent and the user doesn't need to close the lid.
>  >
>  > Is this possible?
> Yes.  I don' have a 1.5 with me at the moment but from looking at the 
> OFW source I think you want ' .temp-rise '.
> ok .temp-rise
> That should run the thermal test and print a pass fail message.  It also 
> returns back a true or false on the stack for if the test passes or fails.

Thanks, looking into that part of OFW code. 


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