on my clean install of Xubuntu 15.10 I am unable to make hibernation work, although it's been working on my laptop successfully since 11.10 or so.
The only thing changed is that I have selected "encrypt home" during install and so I have it encrypted. But I noticed swap was also being encrypted. OK, so it couldn't work.
So I decided to unecrypt my swap in order to make hibernation work again.
What I did:
sudo swapoff -a
sudo cryptsetup remove /dev/mapper/cryptswap1
removed the only line in /etc/crypttab
sudo /sbin/mkswap /dev/sdaX
sudo swapon /dev/sdaX
removed the line with "/dev/mapper/cryptswap1" in /etc/fstab and replaced it with "UUID=d30170d7-b3a2-41b5-a389-541a6d0013c7 none swap sw 0 0" (new UUID taken from the mkswap's output)
sudo pm-hibernate again with no luck :/ - after booting-up several apport errors have been generated...
So, please, any hints how to make it work again? Thanks!