I can't seem to get the front panel working in conjunction with my sound card. Before, when I was using onboard sound, I could just plug my headphones into the front of my case and it would switch over from the speakers to the headphones without issue. Since installing a sound card however the only option has been to unplug the speakers and then plug in my headphones after, which is less a poor workaround.
I've put up with this for a while since I bought my sound card, but I've had to replace my old headphones recently and the newer ones are much shorter; therefore unable to reach my ears unless I lean really far forwards. So I need a fix for this problem. I've browsed the Asus forums for a solution but besides a lot of answers advising people to change settings in the audio centre to "FP Headphone" (which, incidentally, I have done already) there were only dead ends.
The front panel is still connected to the onboard audio device, and not the Xonar. As such, the Xonar is the default output device, and has priority. However, if you re-insert a plug into the front panel, the onboard chipset correctly determines a plug has been inserted [via jack sensing], and becomes the active device again, thus why you need to unplug-replug every time you want to use the front panel.
A quick test would be to set the default device back to onboard, and try using the front panel. [No, you don't need to uninstall anything; you can switch the active device from the Windows Control Panel] I suspect the front panel is connected to the onboard sound chip, and not the Xonar.
Also, why not just connect directly to the back of the Xonar?