I recently got this problem some how whenever i put my my headphones on front panel audio jack the sound seems to come from both devices simounteniously then i did a sound test with left and right speaker test when i did test the sound from left came from my headphone and but speaker seems to work fine i have an asus motherboard i updated every drivers and degraded it doesn't seem to work and it doesn't even recognize my front audio panel that a device is been plugged in.