I don't know what this is called, but I am sure I am not the only one to have this issue. Essentially, sometimes when I switch to other inputs on my receiver, I will not have sound when I switch back to my HTPC. i.e. I'll watch a movie on my PC, then watching some TV on my DVR and then go to watch a movie again on the HTPC. Video will work great, but nothing in the sound department.
I'm running WIndows 7 32 bit SP1 (note this problem is not related to my SP1 install) on a Core i3 520 using the onboard connection. I'm running things out HDMI and outputing LPCM since my Denon receiver does not support bitstreaming. I should note I don't turn off the PC - it's on 24/7 so when I switch inputs the PC is still on.
Is this the silent stream problem? Is there anyway to fix it? At this point I simply reboot the PC and then it's fine again.