ArcadeVGA 3000 and UEFI BIOSes?

[wesbrown18]

I have in my hands an ArcadeVGA 3000, installed in an AMD Llano A8 APU based system.

I appear to be having issues related to UEFI -- basically, UEFI seems to want to force the screen into a higher resolution than the initial ArcadeVGA 3000 15khz mode.  At this point, the ArcadeVGA seems to stay in 31.5khz and above mode, which makes it not work via the J-PAC hooked up to my Nanao 2931.

Has anyone else gotten an ArcadeVGA setup working with a recent UEFI BIOS that seems to force the resolution?

[JoeB]

Once you boot into windows you should get 15k as Andy's driver should take over from EFI. You sure you got the windows driver installed correctly and selected 640x480i?

[wesbrown18]

JoeB,

Thanks for the suggestion -- I'm using GroovyArcade.  It turns out that it was partially a confluence of several things:

• UEFI wanting a higher resolution on boot -- and wanting a higher resolution than available at 15khz
• The GRUB boot splash screen using a higher default resolution because that's what the EFI BIOS set up
• The newer ArcadeVGA 3000 cards *may* have DVI-I instead of VGA output at the card connector level
• This causes selecting VGA outputs from the GRUB menu to not work properly
• The JPAC JAMMA video connector not working well with 31.5khz -- or the Nanao 2931 not working well with 31.5khz signals via the JAMMA connector

I will be investigating in more detail to see what's happening here.

Modified: Added note about JAMMA video connector.