rMBP is going to sleep when plugged to an external display (TV)

[GoogleCodeExporter]

Hello,

I was trying to play movies on my TV using my MacBook Pro Retina 13" with 
closed-lid.

What I did was easy:
1. Plug the HDMI Cable on the TV and then on the MacBook.
2. Launch the video file using VLC.
3. Close the lid.

All seems to work fine during 15 seconds. Then, black screen on the TV, the 
MacBook went to sleep.

I'm running OS X Yosemite 10.10.4 with NoSleep 1.4.0.
All is working fine with while I'm not using the TV.

Tell me if you need more informations!
I searched through the Issues and I find similar problems but it wasn't that 
clear so I decided to create a new issue. I hope that it isn't a problem. :)

Original issue reported on code.google.com by [email protected] on 6 Aug 2015 at 9:36