J-PAC split screen

[clutch]

I searched for a solution but came up empty.

NVIDIA onboard graphics hooked to JPAC.  I've jumpered 15 and 31 because my Nanao 2933 multisync if fully capable of autoswitching.  However, I get a split screen on everything (like the screen starts in the middle and overflows to the right then continues on the left).  If I only put a jumper on 31, everything works fine.  Same for 15, everything works fine.  I want to jumper both so I can run pac-man at 15 and the newer games at 31.  Am I missing something here?

[clutch]

I was told by Andy that the JPAC was intended for single resolution monitors and that if you have a multi-switching monitor, use the vga cable.