This is driving me nuts. Please help.
After I installed a new HD5670, I connected it to my AV receiver (Yamaha RX-V765) via HDMI and then another HDMI from the receiver goes to the TV (Panasonic 46PZ80B). Receiver handles audio, TV shows picture, HDMI is set to passthrough in the receiver so that even with the receiver off (standby) the TV shows picture.
Now, when I want to listen to radio I can't use the computer at the same time because the video signal from the receiver to the TV goes to black. Same for all the other audio sources.
So, to solve this, even though it's not the most convenient solution, I thought of using the DVI output from the HD5670 with a DVI-HDMI cable connected directly to the TV. Then set it up as clone display.
This does not work the first time you set it up for some reason (it shows an empty desktop on the second display, as if it's extending the desktop rather than cloning it) but works after a reboot. Yet, if I switch twice from HDMI1 to HDMI2 on my TV, then it doesn't work again (showing the empty desktop again).
Tried playing with the settings many times but unsuccessfully.
Any ideas please?
OS: Windows 7 Pro 64bit, latest ATI catalyst drivers.
PS. The ATI drivers don't distinguish between the two displays in clone mode, there's no primary/secondary, they are just two branches in the same hierarchy (both identified as "1").
I tried disabling (and disconnecting) the HDMI so then the DVI was the only kid in town, then plugging and enabling the HDMI, first setting it as extended with a clear subordinate role (identified as "2") and then setting it as cloned, hoping that internally it would be the second display. And now, DVI shows desktop as normal and the amp shows the little red "HDMI" indication, and sound works, but video doesn't show on the DVI output, and when I switch to HDMI2 on the TV (i.e. the input from the receiver), then the receiver seems to lose the connection to the PC (!). The red "HDMI" indication disappears, and the TV shows a black screen, and audio stops too.
How can it be so difficult?
And worst of all, this scores about -500 WAF points. We had a working system and now that I upgraded everything to have HD-audio, it seems we have nothing!