linux-kernel - Re: [PATCH] ACPI suspend: Blacklist HP xw4600 Workstation for old code ordering

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Message-Id: <200810151605.35883.rjw@sisk.pl>
Date:	Wed, 15 Oct 2008 16:05:35 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Len Brown <lenb@...nel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	John Brown <john.brown3@...com>
Subject: Re: [PATCH] ACPI suspend: Blacklist HP xw4600 Workstation for old code ordering

On Wednesday, 15 of October 2008, Matthew Garrett wrote:
> On Tue, Oct 14, 2008 at 10:54:06PM +0200, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rjw@...k.pl>
> > 
> > ACPI suspend: Blacklist HP xw4600 Workstation for old code ordering
> > 
> > HP xw4600 Workstation is known to require the "old" (ie. compatible
> > with ACPI 1.0) suspend code ordering, so blacklist it for this
> > purpose.
> 
> This doesn't seem to be scaling especially well. The xw4600 is a new 
> machine, so if it needs the "old" code ordering then that's a strong 
> indication that we're doing something wrong.

No, sorry.

> I think trying to work out what would be more useful than just adding it to
> a blacklist. 

Well, machines that require the "old" ordering are simply broken, because
you just can't assume that specific devices are not in D3 before you
execute _PTS.

IOW, we aren't doing anything wrong and the BIOS is buggy.

Thanks,
Rafael
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