My HTPC is connected to a Onkyo AVR (the HT-RC360) via HDMI. Sometimes, the audio and/or video will refuse to work right when waking from S3 sleep… cycling the power on the AVR (but leaving the PC and TV on) will cure the problem.
I’m not sure if it’s the fault of the Onkyo AVR (I’m finding that most AVRs aren’t very PC friendly in one way or another) or if it’s Intel’s (Sandy Bridge) graphics drivers. However, it doesn’t happen much and a quick power off & on to the AVR usually fixes it.
