Re: Buggy BIOS on the HP TX2500-series

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On Thu, Oct 09, 2008 at 08:59:15AM +0800, Zhang Rui wrote:
> On Wed, 2008-10-08 at 12:26 -0700, Matthew Garrett wrote:
> > A patch went into the kernel earlier this year to ignore critical trip
> > points that were below 0.
> well, I think this patch is wrong.
> a critical trip point below 0 Celsius doesn't mean it's invalid.

I think it's pretty clear that a critical trip point below 0 celsius 
means that the critical trip point is invalid, though I agree that 
ignoring the entire thermal zone as a result is somewhat unfortunate.

> windows can work well on this laptop.
> please look at:
> http://bugzilla.kernel.org/show_bug.cgi?id=10686#c13
> IMO, we need to fix the ACPICA code first of all.
> 
> Ming, what do you think of the patch in comment #15 and #16?

We could quibble over the technical correctness of this approach, but it 
seems to behave in exactly the same way - ie, Linux will ignore the 
thermal zone? The existing code seems fine, other than the fact that a 
bad _CRT will result everything failing. I think we'd be better off just 
losing the return -ENODEV there and try to use as much of the thermal 
information as we can.

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
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