Can you help me what to do... I have Windows 7 and ATI Radeon HD 5770... I use an HDMI -> HDMI Connection from my Video Card to my LCD Monitor... Basically, everything is working fine when I restart... but if I turn my monitor off... and then back on, the HDMI Audio disappers... when I check my playback devices,,, it says not plugged in
I already have the latest version of the Video Card Driver from AMD (v12.4 64-bit)... I also tried to get the latest version of ATI HDMI Audio driver (2.67) from the Realtek website but the problem persist...
while trouble shooting... I tried to un-install Catalyst and the problem disappered (HDMI stays on even if I turn LCD on and off)... However, this has caused my PC to experience an "unexpected reboot" which when I go to debugger says was caused by my video card.
its a driver issue. use an older version till they fix it, or plug in the monitor speakers with the 3.5mm cable instead. you may also be able to disable/enable it or manually turn it back on in the driver. that's what I had to do till nvidia fixed the problem in their drivers that did the same to my laptop. or unplug/replug every time