Christopher, for the last few months I've been testing a whole  range of kernel 
versions of  2012-2011.  The last one was 3.4.0-rc1. The pm-hibernate bug was 
present in ALL of those. Why to expect a fix in that last one? I don't see a 
single pm commit there. Branches >3.2 break the sound input for me as well.
  
Now I am running "2.6.38-14-generic #58-Ubuntu SMP Tue Mar 27" without a single 
hibernate. It is as solid as rock.
That is why, the bug is in the pm-hibernate module, possibly somewhere in  the 
way the memory is dumped on the disk. I've got across a few such old 
pm-hibernate regression bugs from the git logs.

The question is to identify the piece of code in pm-hibernate module that 
causes it.
One interesting fact is that in all of the kernel oopses I got there was " last 
sysfs file: 
/sys/devices/pci0000:00/0000:00:14.4/0000:09:04.0/net/wlan0/statistics/collisions"
At the same time I can see that when I don't suspend machine to disk and it is 
stable, nm-applet process is constantly leaking memory getting up to 300 megs 
when I restart it.  Perhaps it is not a mere coincidence.

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https://bugs.launchpad.net/bugs/922976

Title:
  Kernel Oops - BUG: unable to handle kernel paging request at 850f08bc;
  EIP is at kmem_cache_alloc+0x50/0x100

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