Re: Future directions for ibm-acpi, and a rfc

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On Tue, 2007-02-06 at 18:41 -0200, Henrique de Moraes Holschuh wrote:

> My current slow-burner work is:
> 	1. Add monitoring kernel thread
> 	2. Monitor the fan using that thread, detect tachometer and
> 	   fan quirks automatically using the thread

Can you outline that one a bit more detailed, please.
This is for debugging only or also to workaround ThinkPads with bad EC
firmware which potentially leads to overheats?

AFAIK fans on newer models are controlled via EC firmware.
You can influence the control via direct EC writes which should only be
called by the original DSDT's AML code provided by BIOS.
Adding code that overrides the way the fan is intended to be controlled
for problematic models or by monitoring temperature sounds complicated
and risky. (not sure whether this is what you want to do..).

Thanks,

   Thomas


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