I am having (very VERY) strange display issues on my Pi 3... I am using an HDMI-VGA Adapter ( https://www.adafruit.com/product/1151 ) which works perfectly fine (it works with many different devices with many different displays and display settings).
These settings work, and continue to work through reboots and halts (and restart performed with a reset switch):
These work until the power itself is unplugged. Once that is done, the screen is black on boot (I don't get the "no signal" prompt on the screen as I would when there is no power or connection). Once this happens, the only way to get the previous settings to work is to first change them to:
and reboot. This properly displays at 720p, as expected, all other settings I have tried at this point either result in the same kind of black screen, or some kind of "out of bounds" prompts on my screen. From here, I next have to change these settings to:
and reboot. Note that if I try to use these settings PRIOR to the 720p, these will not work, they will just show a black screen. From here, I can now change those settings to:
and reboot, and FINALLY we're back to the settings I want to use; and just like the previous settings, if I just jump to this, all I get is a black screen. And again, these settings work, and continue to work through reboots and halts (and restart performed with a reset switch), but as soo as I pull the power connection, I have to go through this process to get back to the "proper" display.
What is going on here???