We are building several X11DPG-QT based systems, and when we connect the audio cable from the motherboard headers to the front panel, it could not detect the speakers. We are using 3ft cable, is there any spec for the cable?
For audio cable, you can order the cable from our resellers, the P/N is CBL-0455L. Otherwise, you can make your owned cable as long as it is <= 60cm.