Further info: turns out that the system is running without swap space:

$ sudo blkid
/dev/sda2: UUID="<the-UUID-here>" TYPE="ext4"

... lists only one, when it shoud list also the swap partition. So:

$ sudo swapon -a
swapon: /dev/mapper/cryptswap1: stat failed: No such file or directory

The /etc/fstab lists the swap partition under /dev/mapper/cryptswap1.
While I never chose to encrypt swap, during the installation I did
choose to encrypt my home directory. Perhaps the installer encrypted
swap as well, and that is creating the problem with the lack of suspend
and hibernate.

Attempting to run "sudo swapon -U <UUID>" fails as well. I used the UUID
listed in a comment in fstab.

Any specific solutions to this problem? Perhaps this would solve the
suspend/hibernate as well.

Thank you.

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https://bugs.launchpad.net/bugs/1371159

Title:
  MacBookPro 11,1 (Haswell, retina) fails to both suspend and hibernate
  with ubuntu 14.04

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