linux-kernel - Re: Lenovo 3000 N100 i8042 problems

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Message-ID: <20080902084801.ZZRA012@mailhub.coreip.homeip.net>
Date:	Tue, 2 Sep 2008 08:51:12 -0400
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	Jiri Kosina <jkosina@...e.cz>,
	Daniel Barkalow <barkalow@...ervon.org>,
	linux-kernel@...r.kernel.org,
	Christopher Desjardins <cddesjardins@...il.com>
Subject: Re: Lenovo 3000 N100 i8042 problems

On Tue, Sep 02, 2008 at 09:43:13AM -0300, Henrique de Moraes Holschuh wrote:
> On Tue, 02 Sep 2008, Jiri Kosina wrote:
> > so the product name both of System and Base Board are different, and 
> > apparently the systems differ. Dmitry, what fields would you propose to be 
> > put in the DMI matching here? I will do the patch then.
> 
> Are you sure you shouldn't be looking at BIOS version, instead?

Unfortunately we can't do "less than" type of comparison on DMI data,
otherwise it would be great solution.

> I don't know
> how the Lenovo N100 series is, but chances are their i8042 is emulated
> inside the ACPI EC, i.e. a firmware upgrade can change the i8042 behaviour.
>

I think this is true for all boxes manufactured in the last 8 years.

> I'd check BIOS versions, and ask people to upgrade to the latest, to see if
> the problem goes away (or changes).  Then you will know for sure the best
> approach.
>

Keeping compatibility with the other OS is the safest way so unless
Vista started using active MUX there is probably update to the BIOS
fixing legacy mux mode.

-- 
Dmitry
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