linux-kernel - Re: acerhdf.c - unsupported notebook

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Date:	Tue, 13 Jul 2010 19:12:04 +0200
From:	Peter Feuerer <peter@...e.net>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Branislav Gajdos <brianzee@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: acerhdf.c - unsupported notebook

Hi Boris, Hi Branislav,

Borislav Petkov writes:

> From: Branislav Gajdos <brianzee@...il.com>
> Date: Tue, Jul 13, 2010 at 04:27:37PM +0200
> 
>> >> acerhdf: unknown (unsupported) BIOS version Acer/Aspire 3810T/V1.04,
>> >> please report, aborting!

I'm wondering, why acerhdf is even loaded for your notebook, as no 
MODULE_ALIAS matches:

[...]
MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:");
MODULE_ALIAS("dmi:*:*Acer*:pnAspire 1410*:");
MODULE_ALIAS("dmi:*:*Acer*:pnAspire 1810*:");
MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:");
[...]

Which distribution do you use? Does the distribution somehow autoload acerhdf? Or do you manually load the driver?

> Peter, it looks like we support not only Atoms with that driver. Maybe
> we should check the cpu specs of the 1810T for example (and google says
> there are several different cpu types packaged with those laptops)
> before we enforce temperature limits on them...? And let me ask you
> this: are all those 1810T* entries in the bios_tbl there because of
> noisy fans ...?

Boris, I agree, we really should check the cpu specs. A quick search got me to this page: http://www.hardwaresecrets.com/article/Maximum-CPU-Temperature/143/5 where we clearly see, that the core 2 have much lower critical temperatures. 
I added all those 1410* and 1810T* entries on behalf of people telling they'd have the fan control working with these lines for some weeks without problems and I didn't care about searching for the netbooks specifications. My fault.

I would propose to enhance the bios_tbl by the default temperatures. What do you think?

thanks and kind regards,
--peter;
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