Yes, it is the problem of the receiver. It fails to re-assert the EDID signal from the TV. I have an Integra processor (from the same stable as the Onkyo) and I do not have to turn on my display to use any of my HDMI sources.
BTW, in addition to requiring more cables, using the MCH analog input also deprives you of the DSP processing in the Onkyo.
Kal
BTW, in addition to requiring more cables, using the MCH analog input also deprives you of the DSP processing in the Onkyo.
Kal