When putting together the new mythfrontend I hit a little trap for young players with the J&W JW-G82UM-PVHD+ motherboard that I thought I might blog about and maybe make for some Google bait. This motherboard has built in nvidia video, with a choice of VGA, DVI and HDMI connectors. You can't use DVI and HDMI simultaneously, you have to choose which one is active.
Although there is a BIOS switch that claims to control this selection, it is nothing but a filthy lie put in by bored BIOS programmers. Whether DVI or HDMI is enabled on this motherboard (and probably other J&W motherboards) is controlled by the completely undocumented JDVI_HDMI jumper. It is a large 3x9 pin jumper block located immediately behind the HDMI connector. As shipped, with the jumper in position 2-3, DVI is enabled. Move the jumper to 1-2, and HDMI is enabled.
I've taken a picture of the motherboard with the relevant jumper block circled. The jumper block is in position 1-2, i.e. HDMI enabled.
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