I have front panel mic/headphone ports. Also on my AC powered Altec Lansing speakers there is a headphone port. If I plug in my headphones into speaker port it mutes speaker and sound comes through headphones which is correct. When I plug in headphones into front paned ports of my case I get sound through my headphones as well as my external speakers. I've checked in my settings on my VIA HD Audio sound control panel and can't find anything or I'm missing it. Or is there something in the bios that I missed. It's no big deal just annoying that it's not working properly.