I watched some video for around 20 mins or so and checked the settings with 'xset q' in terminal. There were different settings for dpms in the states where I had originally put '0 0 0'.
Did something occur that might have caused noblank to run ...... such as logging out and in again?
Nothing happened to the system to cause noblank to run. As I said, I was watching a movie, and did not touch a thing.
As an update for you....This is the first time I have used my PC since approx 10pm (local time UK) last night. IT's gone 3 pm the next day here now, switched my monitor on and still no blanking!!
Just checked 'xset q', and this is what I got:
DPMS (Energy Star):
Standby: 0 Suspend: 0 Off: 0
DPMS is Disabled
Server does not have the FontCache Extension
The states are still zero's, but dpms is disabled this time. I cant explain why it changes from enabled to disabled, but at least the states are still disabled by the zero's. I think I am going to keep my system this way with an edited ~/.bash_profile file, as previously described by adding the 3 lines mentioned above. Its not perfect, I know, but at least the behavior allows me to watch movies unhindered.
I did check out Msec as suggested, but could not see anything related to dpms, but then again this is still relatively new to me so I could easily miss something.
If you guys find anything more, let me know. I'll leave this open a day or so (if thats ok?)