linux-kernel - Re: 2.6.25-rc2 System no longer powers off after suspend-to-disk. Screen becomes green.

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Message-ID: <47BEFE5C.6080808@rtr.ca>
Date:	Fri, 22 Feb 2008 11:54:52 -0500
From:	Mark Lord <lkml@....ca>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jesse Barnes <jesse.barnes@...el.com>,
	Jeff Chua <jeff.chua.linux@...il.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Dave Airlie <airlied@...ux.ie>, linux-acpi@...r.kernel.org,
	suspend-devel List <suspend-devel@...ts.sourceforge.net>,
	Greg KH <gregkh@...e.de>,
	Alexey Starikovskiy <aystarik@...il.com>
Subject: Re: 2.6.25-rc2 System no longer powers off after suspend-to-disk.
 Screen becomes green.

Rafael J. Wysocki wrote:
>
> No.  Again, if there are devices that wake us up from S4, but not from S5,
> they need to be handled differently in the *enter S4* case (hibernation) and
> in the *enter S5* case (powering off the system).
..

Something I've never understood, is why we would ever want to bother with *S4* at all?

I actually like hibernation (great for travelling), but I treat it as if
it were a complete power-off (S5?).  I pull batteries, unplug drives,
boot other operating systems, etc..

And when I put it all back together again with the Linux disk inserted,
I fully expect it to "resume" from the hibernation of 3 months ago.
And it does.

Why would I ever want anything less than a full poweroff for hibernation ????

Thanks.
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