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

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Date:	Wed, 20 Feb 2008 19:25:16 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Jeff Chua <jeff.chua.linux@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jesse Barnes <jesse.barnes@...el.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Dave Airlie <airlied@...ux.ie>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-acpi@...r.kernel.org,
	suspend-devel List <suspend-devel@...ts.sourceforge.net>,
	Greg KH <gregkh@...e.de>
Subject: Re: 2.6.25-rc2 System no longer powers off after suspend-to-disk. Screen becomes green.

On Thu, Feb 21, 2008 at 02:49:39AM +0800, Jeff Chua wrote:

> Here's an interesting discovery. After I found that "echo reboot >
> /sys/power/disk" does reboot, I tried "echo shutdown >
> /sys/power/disk", it does shutdown properly.
> 
> With "platform" it refuses to shutdown. Both reboot and shutdown still
> end up with Mr. Green at resume.

That kind of suggests that the ACPI platform code is hitting the 
hardware directly - we've seen similar issues with PATA controllers. The 
right thing to do here is almost certainly just to avoid explicitly 
powering down hardware on hibernation.

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