Ok, I tested it - hibernation still doesn't work, sleep works but after waking up the system hangs (that also happened before my changes to fstab and resume). My laptop is HP nx6325 EY349EA. I didn't noticed the lack of swap because I have 1GB of RAM.
-- After running mkswap, swap space is discarded, system fails to hibernate (invalid swap signature) https://launchpad.net/bugs/66637 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
