I have an HP Compaq 8510w laptop, and a Realtek HD Audio soundcard, using Windows 7 RC1, with all Windows Updates coming in as they're released. Whenever I'm listening to music and movies, the audio works fine, never a complaint. Whenever I leave my computer alone for a few minutes, I see the mute button on my laptop light up. When I try to play a song or watch a movie at that point, it takes about 5-8 seconds for the audio to start playing, and then I usually have to restart the song or video because the sync is off by then. Reading some posts, I think it's a power management issue, a feature where Windows sends the sound card driver into D3Cold status. I can't find where to turn this off, however. I set all my power management options to "always on, full power, no selective suspend' etc etc. Does anyone know how to stop this from happening? On another, less important note. I cannot get sound from my HDMI port. I tried installing many different drivers (uninstalling the previous ones first, of course), including the Realtek HD Audio drivers, but to no avail. I'm posting this thread in both Hardware and Support. Hope that's ok.