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

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Date:	Mon, 7 Aug 2006 12:23:24 -0400
From:	Jason Lunz <lunz@...ennom.net>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	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]

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.

Jason
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