Bug#779412: pm_async breaks "machinecheck" udev rules

[Chris]

I intended to close my report here, as udev already supports udev
rules that trigger on resume, and packages can just use 
"machinecheck" udev rules to hook themselves into resume events.

There may still be a fix required for udev to work on some hardware,
but that issue has been closed for now.
(See:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=783638)

So I'll leave this open for now.