linux-kernel - Re: Commit 500f7147cf5bafd139056d521536b10c2bc2e154 breaks _resume

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Date:	Sun, 06 Feb 2011 14:19:54 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Marc Koschewski <marc@...nowledge.org>
Cc:	Jeff Chua <jeff.chua.linux@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Commit 500f7147cf5bafd139056d521536b10c2bc2e154 breaks _resume_

At Sun, 6 Feb 2011 13:24:08 +0100,
Marc Koschewski wrote:
> 
> Read this
> 
> 	[REGRESSION g01539ba] Hibernate broken on T510i
> 
> or this
> 
> 	[REGRESSION] S3 resume on SandyBridge doesn't work with NX protection (5bd5a45)

But this should be definitely irrelevant with i915 fixes I've been
involved with.  The NX problem already existed in rc1, IIRC.

I wonder what problem is fixed for Jeff.


thanks,

Takashi


Takashi

> 
> Marc
> 
> * Takashi Iwai <tiwai@...e.de> [2011-02-06 12:00:15 +0100]:
> 
> > At Sun, 6 Feb 2011 09:50:51 +0800,
> > Jeff Chua wrote:
> > > 
> > > 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.
> > 
> > Hrm, what is the symptom?  I couldn't find it because you cut off the
> > thread, and it's not cited.
> > 
> > The commit you mentioned just adds an interface, and the the callbacks
> > aren't defined.  The real change is either in
> >   commit f3269058e7a80083dcdf89698bfcd1a6c6f8fd12
> >     drm/i915/crt: Force the initial probe after reset
> > or
> >   commit 5d1d0cc87fc0887921993ea0742932e0c8adeda0
> >     drm/i915: Reset crtc after resume
> > 
> > Also the fix might interact with
> >   commit 811aaa55ba21ab37407018cfc01770d6b037d3fb
> >     drm: Only set DPMS ON when actually configuring a mode
> > 
> > 
> > thanks,
> > 
> > Takashi
> > 
> > > 
> > > Thanks,
> > > Jeff
> > > 
> > > 
> > > 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>
> > > 
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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> > Please read the FAQ at  http://www.tux.org/lkml/
> > 
> > 
> 
> -- 
> Marc Koschewski
> 
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