linux-kernel - Re: dsdt buggy acpi

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Message-ID: <20080702115527.GA3396@srcf.ucam.org>
Date:	Wed, 2 Jul 2008 12:55:27 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
Cc:	Justin Mattock <justinmattock@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: dsdt buggy acpi

On Wed, Jul 02, 2008 at 02:48:20PM +0300, Eduard - Gabriel Munteanu wrote:
> On Wed, 2 Jul 2008 11:09:35 +0100
> Matthew Garrett <mjg59@...f.ucam.org> wrote:
> > We've made a huge number of workarounds for buggy DSDT
> > implementations.
> 
> Of course, I myself used a custom DSDT for my laptop. But I was saying
> that these workarounds generally do not belong to the kernel realm.

Of course they do. Nothing else is going to fix them up.

> This isn't the regular "Pentium F00F bug" stuff; instead bugs in DSDTs
> consist of compiling issues, non-standard compliant, plainly bad
> code, Windows-only stuff, which can all be unique for every model of a
> laptop for example. While the kernel may be able to get around some of
> that stuff, the kernel won't have any Asus, Acer etc. specific
> workarounds.

Windows doesn't have any Asus/Acer/whatever workarounds either. We just 
need to be compatible with the Windows implementation. There's a 
minority of cases where that isn't good enough, but almost every DSDT 
issue can (and should) be handled by Linux if the machine works under 
Windows.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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