I'm using a lamp projector attached via VGA to a MacBook running OS X 10.6.
The problem that I'm experiencing is that the image is all green. How much green? Well, it looks like there is no red channel at all, but not quite macrovision-green.
The same hardware combination worked ok in the past, the only thing that has changed is that now I'm using a very long VGA cable (at least 20m/60ft I'd say).
I've tried every possible color setting on the two devices (including, but not limited to: recalibrating, choosing different “color modes” on the projector, changing channels luminosity values), so is the cable the only possible cause left?
Is it a broken cable, or is it just too long and the signal will degrade?