From: Borislav Petkov on
From: Branislav Gajdos <brianzee(a)gmail.com>
Date: Tue, Jul 13, 2010 at 01:44:38PM +0200

+Peter
+lkml

> I'm not sure if you're the right person to write to but my linux
> kernel (2.6.34.1) outputs this line while booting:
>
> acerhdf: unknown (unsupported) BIOS version Acer/Aspire 3810T/V1.04,
> please report, aborting!

It doesn't look to me like this machine is a netbook with an Atom cpu
supported by this driver. Do as root:

dmidecode > dmi.log

and send me the dmi.log file please.

Thanks.

--
Regards/Gruss,
Boris.
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From: Branislav Gajdos on
Hi Borislav,

On Tue, Jul 13, 2010 at 2:48 PM, Borislav Petkov <bp(a)alien8.de> wrote:
>
>> acerhdf: unknown (unsupported) BIOS version Acer/Aspire 3810T/V1.04,
>> please report, aborting!
>
> It doesn't look to me like this machine is a netbook with an Atom cpu
> supported by this driver. Do as root:

That's possible, I'm not sure what exactly this driver does. However,
I've seen Aspire 1810T definitions in the file already (in bios_tbl
table) which is afaik 11" version of 3810T, so I decided to report it
for completeness.

> dmidecode > dmi.log
>
> and send me the dmi.log file please.

attaching the file.

Branislav
From: Borislav Petkov on
From: Branislav Gajdos <brianzee(a)gmail.com>
Date: Tue, Jul 13, 2010 at 04:27:37PM +0200

> >> acerhdf: unknown (unsupported) BIOS version Acer/Aspire 3810T/V1.04,
> >> please report, aborting!
> >
> > It doesn't look to me like this machine is a netbook with an Atom cpu
> > supported by this driver. Do as root:
>
> That's possible, I'm not sure what exactly this driver does. However,
> I've seen Aspire 1810T definitions in the file already (in bios_tbl
> table) which is afaik 11" version of 3810T, so I decided to report it
> for completeness.

Hmm, acerhdf is a driver for, originally, acer aspire one netbooks with
noisy fans. We have static limits which turn on the fan at 63 °C and
off again when the temperature reaches 58 °C - those are at least the
defaults.

Now you have a Core 2 Duo U9400 for which I can't find the specs after a
quick search but it looks like something a little bit more powerful than
a netbook cpu but still ultra low power. So, before we dig further into
this, is your fan noisy at all?

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 ...?

Thanks.

--
Regards/Gruss,
Boris.
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From: Peter Feuerer on
Hi Boris, Hi Branislav,

Borislav Petkov writes:

> From: Branislav Gajdos <brianzee(a)gmail.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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From: Branislav Gajdos on
Hi Peter,

On Tue, Jul 13, 2010 at 7:12 PM, Peter Feuerer <peter(a)piie.net> wrote:
>>
>>> >> acerhdf: unknown (unsupported) BIOS version Acer/Aspire 3810T/V1.04,
>>> >> please report, aborting!
>
> Which distribution do you use? Does the distribution somehow autoload
> acerhdf? Or do you manually load the driver?

I compiled the kernel myself and chose the driver as my notebook was
Acer Aspire, I didn't realize it was meant only for netbooks :-)

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

So that means you would keep there the definitions for Core 2 based
models as well, right?

Branislav
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