Re: [Bug #13644] hibernation/swsusp lockup due to acpi-cpufreq

[Johannes Stezenbach]

On Mon, Jun 29, 2009 at 02:31:01AM +0200, Rafael J. Wysocki wrote:
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=13644
> Subject		: hibernation/swsusp lockup due to acpi-cpufreq
> Submitter	: Johannes Stezenbach <js@xxxxxxxxx>
> Date		: 2009-06-16 01:27 (13 days old)
> References	: http://lkml.org/lkml/2009/6/15/630
> Handled-By	: Rafael J. Wysocki <rjw@xxxxxxx>

I tested v2.6.31-rc1-228-g2bfdd79 and the bug is still there.
It actually got worse, the local_irq_save/restore workaround
in kernel/up-c (http://lkml.org/lkml/2009/6/16/333) doesn't fix it
anymore, it hangs at suspend before writing out the image.

With the up.c workaround (including a
WARN_ON_ONCE(irqs_disabled() && !oops_in_progress);)
applied and no_console_suspend I captured the attached
output using a crappy webcam.  (Without the workaround
there is a huge spew of warnings about irqs enabled
unexpectedly.)  I guess the interesting part is

  pm_op(): pci_pm_thaw returns -16
  PM: Device 0000:00:00.0 failed to thaw: error -16

(PCI info is in http://lkml.org/lkml/2009/6/15/630)


Johannes

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