Ilpo Ruotsalainen <lonewolf@iki.fi> writes:

> Try booting without -A switch to enable AGA modes, that makes me end up
> with pure gray screen on my A1200. That is, when the bootloader asks for
> kernel to boot and says default is [netbsd -ASn2] just enter netbsd -Sn2
> instead and hopefully it works better. (Didn't have time to figure out
> why the AGA stuff fails for me - might be bug in code or just that my
> scandoubler doesn't like the mode it tries to use.)

The -A flag enables the AGA chipset and has the "side effect" of
putting the screen in a VGA-like mode. Did you try to remove the
scan-doubler and plug a VGA screen directly to your Amiga?
I don't know scan-doublers. Maybe it doesn't let the VGA signal pass
correctly?

 Aymeric