Ever since I upgraded to Kubuntu 15.10 from 14.10 power management dies after waking up from suspend (to disk or ram). The only thing that still works is dim display but it won't even un-dim. Screen does not turn off, system doesn't go to sleep on timer or anything. I can get it back by logging out and in again but that makes suspend rather pointless. Unfortunately just restarting upowerd isn't the solution. But what is?
This all used to work just fine in Kubuntu 14.10. System is Lenovo Thinkpad X201.