You installed Ubuntu 16.04 and chose to "encrypt the /home partition", now your hibernate mode won't work.
That is because your swap partition is also encrypted now.
sudo swapoff -a
sudo cryptsetup remove /dev/mapper/cryptswap1
sudo vim /etc/crypttab # remove the /dev/sda5 line
sudo /sbin/mkswap /dev/sda5
sudo swapon /dev/sda5
sudo vim /etc/fstab # replace /dev/mapper/cryptswap1 with /dev/sda5
sudo vim /etc/initramfs-tools/conf.d/resume # Replace the existing RESUME line with the following lineÖ: RESUME=/dev/sda5
- Reboot computer. Then try out hibernate mode.