Looking more closely at the issue that the machine does'nt suspend at all, it 
turned out that there were processes spawned by 
/usr/lib/pm-utils/sleep.d/01PulseAudio (pacmd, awk) still hanging around. 
Manually killing them made the machine suspend. Resuming afterwards failed, 
though.
Completely removing 01PulseAudio from /usr/lib/pm-utils/sleep.d makes 
suspend/resume work again.

** Summary changed:

- [LENOVO 8744HDG] late resume failure
+ PulseAudio breaks suspend

-- 
PulseAudio breaks suspend
https://bugs.launchpad.net/bugs/450461
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