linux-kernel - Re: [1/3] 2.6.23-rc6: known regressions v2 --- ieee1394, empty suspend stopped working

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Date:	Sun, 16 Sep 2007 14:09:13 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
Cc:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	Pavel Machek <pavel@....cz>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Gabriel C <nix.or.die@...glemail.com>,
	linux1394-devel@...ts.sourceforge.net,
	Ben Collins <ben.collins@...ntu.com>
Subject: Re: [1/3] 2.6.23-rc6: known regressions v2 --- ieee1394, empty suspend stopped working

On Sunday, 16 September 2007 11:35, Stefan Richter wrote:
> Michal Piotrowski wrote:
> > FireWire
> 
> Could you title it "IEEE1394" instead?  (According to the information so
> far, it's in drivers/ieee1394, not drivers/firewire.)
> 
> > Subject         : empty suspend stopped working around 2.6.23-rc4
> > References      : http://lkml.org/lkml/2007/9/11/326
> > Last known good : ?
> > Submitter       : Pavel Machek <pavel@....cz>
> > Caused-By       : ?
> > Handled-By      : ?
> > Status          : unknown
> 
> I did a quick test on my main test machine, a Mac mini running x86-64
> Linux.  Regardless whether swap is on or off and whether ieee1394 and
> ohci1394 are loaded or not, it always behaves the same.  It does
> something, then ends up with power LED off but a non-blinking cursor,
> i.e. _, still shown on the text console.  Is this good or bad?

Bad.  It's supposed to power off the machine.

Can you please try "echo test > /sys/power/disk" before the hibernation?

After that "echo disk > /sys/power/state" should only "suspend" the box
for several seconds and come back to the command prompt.

If that fails, please try

# echo testproc > /sys/power/disk
# echo disk > /sys/power/state

and see if this returns to the command prompt.

Greetings,
Rafael
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