On 14.04 I tried all suggested solutions: Puny Geeks step-by-step (see
http://punygeek.blogspot.com/2012/10/ubuntu-1204-how-to-solve-disk-
drive-for.html), then again but using /dev/sda8 (swap partition in my
case) instead of UUID, then the approach with noauto parameter in fstab
and the 5 second delay in rc.local (both see
http://askubuntu.com/questions/289858/disk-drive-for-dev-mapper-
cryptswap-1-is-not-ready) but none worked cross reboots.

One thing I find striking is that now:

~$ sudo swapoff -a
~$ sudo swapon /dev/mapper/cryptswap1
swapon: /dev/mapper/cryptswap1: lezen van kop van wisselgeheugen is mislukt: 
Ongeldig argument

... which means something like "reading of swap header failed: Invalid
argument"...

And it turns out after all this I cannot even reformat or recreate the
swap partition in gparted. I get some kind of warning about being unable
to inform the kernel of the changes made...

Starting to regret my choice to encrypt the home partition during
install :(

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https://bugs.launchpad.net/bugs/1153661

Title:
  The disk drive for /dev/mapper/cryptswap1 is not ready yet or not
  present

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