linux-kernel - Re: 2.6.29-rc2 regression: hibernation hang on eeepc-701 (method "platform" only)

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Date:	Sun, 18 Jan 2009 19:19:48 +0000
From:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	kernel-testers@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org,
	linux acpi <linux-acpi@...r.kernel.org>
Subject: Re: 2.6.29-rc2 regression: hibernation hang on eeepc-701 (method 
	"platform" only)

On 1/18/09, Alan Jenkins <alan-jenkins@...fmail.co.uk> 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"').

As a wild guess I tried "acpi_sleep=s4_nonvs", but it didn't help.

In fact it didn't seem to work.  The kernel log says that NVS was
still saved and restored.

$ dmesg | grep -i nvs
[    0.000000]  BIOS-e820: 000000001f790000 - 000000001f7d0000 (ACPI NVS)
[    0.000000] Kernel command line: root=/dev/sda2 ro resume=/dev/sda2
resume_offset=144480 quiet acpi_sleep=s4_nonvs
[   91.105449] PM: Saving platform NVS memory
[   91.106707] PM: Restoring platform NVS memory

Thanks
Alan
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