I recently put together my build and noticed the front panel audio is not working properly. I have an ASRock Z77 Extreme4 motherboard and a Rosewill Blackhawk case. The HD Audio connector is fully seated in the correct place on the motherboard. The audio ports work fine in the rear I/O motherboard panel. I've also tried multiple headphones to take that out of the question. And I've tried updating the Realtek driver, but no update was needed (v126.96.36.19959). Jack Sensing is enabled as well.
I went into the the bios and enabled the HD audio options, but it didn't help.
I have some more information to provide though that may be helpful. When I disable jack sensing and wiggle the headphone jack, I can get sound from one ear plug, no sound, or sound from both ear plugs.
Just to be clear. The problem is the jack on the case so RMA the case.
You enter control panel (if you install HD Audio),choose Realtek HD audio icon,next yuo choose Audio I/O .Click item enter controller systems next you marker item Disable input ... and item Enable auto popup ..are OK.