linux-kernel - Re: [linux-pm] [PATCH 1/3] PCI: Rework default handling of suspend and resume

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Message-ID: <20081207091841.1d460c1a@infradead.org>
Date:	Sun, 7 Dec 2008 09:18:41 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Takashi Iwai <tiwai@...e.de>, Greg KH <greg@...ah.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [linux-pm] [PATCH 1/3] PCI: Rework default handling of suspend
 and resume

On Sun, 7 Dec 2008 14:39:27 +0100
"Rafael J. Wysocki" <rjw@...k.pl> wrote:

> On Sunday, 7 of December 2008, Linus Torvalds wrote:
> > 
> > On Sat, 6 Dec 2008, Linus Torvalds wrote:
> > > 
> > > And btw, I'm talking suspend, not hibernate. 
> 
> Even as far as hibernation is concerned, I wouldn't _expect_ any BIOS
> to do anything like this as long as we use the ACPI facility to enter
> S4.

there are funky scenarios where the BIOS ends up .. not knowing.
Like

you boot your laptop
you then hot-dock your laptop
then you suspend (say S4)

..
during resume, the bios sees a very different system than it saw before.
I can totally imagine not all of them getting it right, esp if other
OSes would just re-register interrupts
--
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