just tried the 11.2. it has the same black-out issue as i had with 11.1.
just to be clear. my system setup are: 46" Samsun LCD HDTV, Onkyo tsx SR606, HTPC with HD5850 outputting through HDMI with both video and audio to the receiver. so essentially both video/audio are sent to the onkyo 606 via HDMI and then finally to the HDTV. with 10.11, or 10.5 (the two drivers i used the most without issues) everything was fine. but with this newest 11.1/11.2 if i turn off the tv, leaving the receiver on, and the hTPC on, after a few hours i lose the video signal (receiver says "no signal"). or even sometimes even with Tv on, receiver on, HTPC on. i just go take a shower and when i get back the tv is blank and receiver will report "no signal". it seems to do this when the HTPC is idle.
again, this seems to be a new issue with the new 11.1/11.2 driver. i've since switched back to 10.11.
TV: Samsung 60inch 60ES8000 LED TV,
Sound System: Pioneer VSX 1120-K, 2x JBL L890 fronts, 1x JBL LC2 center, 4x JBL L820 surrounds, 1x SVS PB12 NSD for a complete 7.1
Headphones: Audio Technica ATH-AD700, AD900X, Sennheiser HD598, HD650, HD800S
Headphone DAC/AMP: Schiit Bifrost / Bottlehead Crack Tube Amp