I have a freshly installed ubuntu 14.04.
In settings "Brightness and locking" I had the following Settings:
Turn monitor off after "10 Minutes"
Monitor locking after "5 Minutes" and "Ticked" Ask for password ...
(Sorry my System is in German, hopefully I have the right translation).
System gets locked after 5 Minutes but never turns off. I always see the login Screen.
I tried to switch the times (First turn off, then login etc...) but always the same result. I can, however manually select standby. Then the monitor switches off. But then i can't wake up the system anymore. No Mouse or Keyboard reaction...
I have the standard Ubuntu graphics driver installed. No extra atm (fglrx) etc.
Here is a example screenshot of my settings. Monitor does not turn off after 10 Minutes. I also tried "Monitor off after 5 Minutes and Screenlock after 10 Minutes". Monitor does not turn off.
Because of 2 comments telling me "It turns off AFTER 10 Minutes". Well I know it's not meant to turn off immediately. But it is not turning off after 10 minutes and not after 30 minutes and not tomorrow ;)