Re: Kernel stops at "PM: Preparing system for mem sleep", never makes it to "Freezing user space processes ... "

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On Sun, Aug 12, 2012 at 1:08 AM, Rafael J. Wysocki <rjw@xxxxxxx> wrote:
> This seems to be the last kernel message you've got.
>
> It looks like there's a problem with a power management notifier within
> the kernel.  Perhaps a race condition, since it is not reproducible 100%
> of the time.
>
> Does it happen if you don't use the lid to trigger suspend?
>
> Rafael

No, it does not.

If I don't use the lid, the suspend succeeds 100% of the time (at
least, I have achieved over 4 days of uptime by using the
logout/suspend button of xfce, I never could stand not closing the lid
for more...)

What I don't know exactly is how to begin tracking this problem down.
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