I have a habit listening to my favorite music in iTunes on my PC which feeds Audio to Onkyo HT-R380 receiver via HDMI cable and another HDMI cable connects to my Samsung monitor (Samsung monitor is the main display).
The power options are default:

Now the problem: I leave the computer while continue to listen to music. But after 10 min, the Samsung monitor display turns off as per power options. But the music also stops at the same time.
I almost broke my head to solve this but it's been bugging me for last 2 months.
I have Nvidia GeForce GTX 670 and I tried all the Windows 8 X64 drivers released so far by Nvidia. Currently on latest WHQL 306.97.
Any help why music stops when screen goes blank?
PS: This issue never happened in Windows 7









