For suspend: did typing the commands manually work at all? (it should basically work until your next reboot)
I was assuming the issue is that when you close the lid, it sleeps for a few seconds, then wakes again. Is that what happens, or is it something else?
No luck with that too, I verified the command working with
cat /proc/acpi/wakeup
XHC1 S3 *disabled pci:0000:00:14.0
I also tried suspending via the menu / power button: same results
Note: You want LID0 to be enabled, so that opening the lid wakes it up.
You could try upgrading your kernel if you're feeling adventurous. If that is the issue, it will probably be backported at some point though.