linux-kernel - BISECTED: 2.6.29-rc2 regression: hibernation hang on eeepc-701

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Message-ID: <497858E1.5070303@tuffmail.co.uk>
Date:	Thu, 22 Jan 2009 11:30:41 +0000
From:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
To:	kernel-testers@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org,
	"Rafael J. Wysocki" <rjw@...k.pl>, Pavel Machek <pavel@...e.cz>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: BISECTED: 2.6.29-rc2 regression: hibernation hang on eeepc-701

Alan Jenkins wrote:
> Hibernation hangs just after writing the image.  With s2disk I can see
> this from the console messages.  The same hang happens with kernel
> swsusp ('echo disk | sudo tee /sys/power/state'), and I can see that
> the image has been written from the HDD led.
>
> In either case, I can still hard-power-off and resume from hibernation.
>
> It doesn't hang if I use the shutdown method (either 'echo shutdown |
> sudo tee /sys/power/disk' or  's2disk -P "shutdown method=shutdown"').
>   

I've bisected this to commit 571ff7584bb9e05fca0eb79752ae55a46faf3a98. 
It doesn't revert cleanly from RC2.

I think it's distinct from the other two reported suspend regressions. 
I'm not using acpi-cpufreq, and the issue doesn't affect resume.

Alan


commit 571ff7584bb9e05fca0eb79752ae55a46faf3a98
Author: Rafael J. Wysocki <rjw@...k.pl>
Date:   Wed Jan 7 13:05:05 2009 +0100

    PCI PM: Power-manage devices without drivers during suspend-resume

    PCI devices without drivers can be put into low power states during
    suspend with the help of pci_prepare_to_sleep() and prevented from
    generating wake-up events during resume with the help of
    pci_enable_wake().  However, it's better not to put bridges into
    low power states during suspend, because that might result in entire
    bus segments being powered off.

    Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
    Acked-by: Pavel Machek <pavel@...e.cz>
    Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org>

:040000 040000 6b6fb7bfa561583f14bdf55b084473dcf9cd1765
d72fbda87eff26db8f2574e868a793b79deb9f92 M      drivers
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