I tried primocache 3.0.1 and the speed is incredible!! However,
the system immediately returns from sleep when Primocache is installed.
Is this a known bug and is there some workaround?
Hmm.. no. But I did run powercfg -systemsleepdiagnostics and something peculiar is there. Entering the sleep mode (while primocache is active) results the following:
TIME USER WENT IDLE IDLE DURATION SLEEP STATE ENTERED
6 2017-12-17 19:30:27 0:29:21 Invalid
and then
The system idle time was reset because: An application has indicated the user is present. 0:42:39 2017-12-17 19:59:47
while the application mentioned is
START TIME DURATION TYPE TOKEN
2017-12-17T19:39:06 0:00:00 System 0xffff8f0213460bf0
3.0.2 fixed the bug that GUI program prevents computer logoff/shutdown. It seems that here the problem was also caused by the GUI program.
Anyway, I'm glad that the problem is solved now!