Comment 105 for bug 205990

@Alex:
As I said before:
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So, in your case, the partition holding the swap file is not yet mounted, therefore it is impossible for the system to look for a 'resume file' inside the swap file, and the same problem occurs.
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IE. because it can't access the swap listed in the resume file, it drops to text boot.

I would <always> advise using a separate partition for swap, anyway.

Note: when I said 'resume file' here, I meant stuff in swap holding information about resuming from hibernation, rather than /etc/*/*/resume