First, let me clarify that I am quite sure I caused this problem. I was having issues getting sound to output to my HDMI output on my HD 5870, so I disabled all the other outputs through playback devices. This was working fine for a few days, and I could switch back to other options, but now playback devices, AND device manager, will not detect anything but the AMD HDMI audio output. I would consider disabling that just to test, but if that had the same issue, I would have to either find a solution or reinstall everything.... So what could cause my PC to not detect the audio devices? Also, I tried updating the drivers after I had this issue for the onboard sound off of the Asus site, with no luck. This is a rather annoying problem, as the speakers built into the monitor are underwhelming, and I was going to use it with my (non-HDMI) surround sound system, using the optical out, but can't at the moment. Thanks in advance, L5 :/