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

From: Alan Jenkins
Date: Thu Jan 22 2009 - 06:30:57 EST

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.


commit 571ff7584bb9e05fca0eb79752ae55a46faf3a98
Author: Rafael J. Wysocki <rjw@xxxxxxx>
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@xxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxxx>
Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>

:040000 040000 6b6fb7bfa561583f14bdf55b084473dcf9cd1765
d72fbda87eff26db8f2574e868a793b79deb9f92 M drivers
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