Hi you guys. I am sorry, but I do not understand anything of your explanation !
I own a A7N8X-X rev. 2.0 mobo, I desperatly try to hear some sound on rear AND front loudspeakers at the same time. I used the Realtek utility to configure the Line-in input as a rear LS output. Then, trying any audio source (CD, wave, etc...), I only get sound on front output (i.e. normal output). The only way to get sound on the rear output (i.e. normaly line-in input) is to set a special effect such as reverberation. I cannot get the same sound on both front and rear output simultaneously !
But I do not understand what you are talking about concerning these jumpers. I do not have any jumpers on my mobo. The only possibility to connect a front panel is to use the dedicated connector, but there is no jumpers on it, and the user manual does not refers to any jumpers setting for the audio !
Are you really talking about A7N8X-X, or did I miss something ?

Sorry for my poor english....