ElEscalador wrote:Are you sure your HDMI is enabled? Also - are have you tried being plugged in on bootup? I think you cannot plug HDMI in on the fly.
You can if you force HDMI hotplug in config.txt:
On the actual issue...the HDMI to VGA converters that get their power from the Pi may not support all monitor resolutions, plus they may use the current that is supposed to power the chip that responds back with monitor data for their own power, thus not allowing the Pi to get that data. This would require that the resolution be coded into config.txt.
If one really HAS to use a VGA monitor, it is best to use a converter with its own power. However, I find it cheaper to get used monitors that have DVI input than it is to buy even cheap HDMI to VGA converters, let alone good ones. I've gotten suitable 19" 1280x1024 monitors for as little as $5.