linux-kernel - Re: swsusp regression [Was: 2.6.18-rc3-mm2]

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Message-Id: <200608072247.59184.rjw@sisk.pl>
Date:	Mon, 7 Aug 2006 22:47:59 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jason Lunz <lunz@...ennom.net>
Cc:	Jiri Slaby <jirislaby@...il.com>, Andrew Morton <akpm@...l.org>,
	linux-kernel@...r.kernel.org, andre@...ux-ide.org, pavel@...e.cz,
	linux-pm@...l.org, linux-ide@...r.kernel.org
Subject: Re: swsusp regression [Was: 2.6.18-rc3-mm2]

On Monday 07 August 2006 18:23, Jason Lunz wrote:
> In gmane.linux.kernel, you wrote:
> >> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc3/2.6.18-rc3-mm2/
> >
> > I tried it and guess what :)... swsusp doesn't work :@.
> >
> > This time I was able to dump process states with sysrq-t:
> > http://www.fi.muni.cz/~xslaby/sklad/ide2.gif
> >
> > My guess is ide2/2.0 dies (hpt370 driver), since last thing kernel prints is 
> > suspending device 2.0
> 
> Does it go away if you revert this?
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc3/2.6.18-rc3-mm2/broken-out/ide-reprogram-disk-pio-timings-on-resume.patch
> 
> That should only affect resume, not suspend, but it does mess around
> with ide power management. Is this maybe happening on the *second*
> suspend?
> 
> > -hdc: ATAPI 63X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache, UDMA(33)
> > +hdc: ATAPI CD-ROM drive, 0kB Cache, UDMA(33)
> 
> This looks suspicious. -mm does have several ide-fix-hpt3xx patches.

I found that git-block.patch broke the suspend for me.  Still have no idea
what's up with it.

Rafael
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