I've searched the web for answers to this, and the only other question that looks exactly like mine concerned Ubuntu 13.10 (8 months ago), with no answer to date. I'm on 14.04. I experience no system problem after resume, but I do see the error 19 flash on the black screen just before waking. It points to device 0:007 as the problem.
Any suggestions? What's the problem with it?
lspci | grep 0:007
ordmesg | grep 0:007
– Nattgew Apr 30 '14 at 15:03