linux-kernel - Re: Commit 500f7147cf5bafd139056d521536b10c2bc2e154 breaks _resume

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Date:	Sun, 6 Feb 2011 09:19:51 +0100
From:	Marc Koschewski <marc@...nowledge.org>
To:	Jeff Chua <jeff.chua.linux@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Takashi Iwai <tiwai@...e.de>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Commit 500f7147cf5bafd139056d521536b10c2bc2e154 breaks _resume_

Hi,

* Jeff Chua <jeff.chua.linux@...il.com> [2011-02-06 09:50:51 +0800]:
> On Sun, Feb 6, 2011 at 2:24 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> >> The suspend monster is back! The suspend-to-ram is fine, but upon
> >> resume, screen is blank. Haven't bisected in case someone has also
> >> done so.
> >
> > BTW, please don't reply to messages containing patches with reports of problems
> > that aren't caused by those patches.  It's confusing at best and at worst it
> > may result in the patches being rejected.
> 
> Sorry. New subject now:)
> 
> 
> On Sun, Feb 6, 2011 at 2:51 AM, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >> It's very recent. ... between commit
> >> 831d52bc153971b70e64eccfbed2b232394f22f8 and
> >> 44f2c5c841da1b1e0864d768197ab1497b5c2cc1.
> >
> > Hmm. It's almost certainly one of the DRI patches, but which one? I
> > think bisection is the only way to figure it out. It shouldn't be too
> > bad, since there's only 120 commits in that range.
> >
> > In fact, you can almost certainly just bisect from 89840966c579 to
> > bb5b583b5279, which is just 31 commits and should get you bisected in
> > just five tries or so.
> 
> Yea, I've just done that. It came down to the following commit.
> Reverting it solves the problem. I've gone thru a few cycles, and
> notebook still survives.
> 
> Thanks,
> Jeff

I reverted the specified commit and my box still suffers the
resume-turns-into-cold-boot behavior. Retried two times with the commit reverted
on top of HEAD...

Regards,
Marc

> 
> 
> commit 500f7147cf5bafd139056d521536b10c2bc2e154
> Author: Chris Wilson <chris@...is-wilson.co.uk>
> Date:   Mon Jan 24 15:14:41 2011 +0000
> 
>     drm/i915: Reset state after a GPU reset or resume
> 
>     Call drm_mode_config_reset() after an invalidation event to restore any
>     cached state to unknown.
> 
>     Tested-by: Takashi Iwai <tiwai@...e.de>
>     Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
> --
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> 

-- 
Marc Koschewski
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