There used to be a workaround with enabling suspending and hibernation, which worked for me at 14.04 LTS, but having cleanly installed 16.04 LTS I lost that, and now my computer won't come back from suspend.
I tried the tutorial listed here: http://ubuntuhandbook.org/index.php/2014/04/enable-hibernate-ubuntu-14-04/ to enable hibernation but running
Leaves me with black screen and processor running, I cannot restore the system, I can only manually shut it down and run again.
Yet my SWAP is bigger than my RAM (8.5 GB).
So I cannot hibernate nor suspend (the latter I can, but the computer doesn't wake up until restarted).
Using Lenovo z50-71, i5 laptop with ATI /Intel hybrid graphics.