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 15:34:35 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	"Jeff Chua" <jeff.chua.linux@...il.com>
Cc:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	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 Wednesday, February 20, 2008 3:03 pm Jesse Barnes wrote:
> On Wednesday, February 20, 2008 2:32 pm Jesse Barnes wrote:
> > On Wednesday, February 20, 2008 11:10 am Jeff Chua wrote:
> > > On Feb 21, 2008 2:53 AM, Jesse Barnes <jesse.barnes@...el.com> wrote:
> > > > > So, next I'll try "shutdown" to see if it work. I was using
> > > > > "platform".
> > > >
> > > > Ok, that would be good to try.
> > >
> > > "shutdown" does power down properly. But still green on resume.
> > >
> > > > Looks like the AR registers are hosed, which is what I thought I
> > > > fixed... Can you attach your i915_drv.c file just so I can sanity
> > > > check it?
> > >
> > > Attached.
> >
> > Jeff, for the hang on suspend problem, I know suspect something else in
> > 2.6.25-rc2 caused that.
>
> Looks like 2.6.25-rc1 also had broken suspend (my test was broken).  IIRC,
> Dave and I had it working at LCA using the out of tree DRM modules on
> 2.6.23.14 or 15...  Maybe you could give that a try?

And just to confirm that, I just tested the current DRM modules against a 
2.6.23.15 kernel.  It suspends to disk correctly (w/o a hang) and doesn't 
give me a green screen, so something in 2.6.25 must be causing that (even 
2.6.25-rc1 seems to have the problem).

Also, this patch against 2.6.25-rc1 seemed to prevent the 'green screen' 
problem.  2.6.25-rc2 already has part of it...

Anyway, let me know how your testing goes.

Thanks,
Jesse
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