I created a dual-boot setup on my Pi 1B today and have it hooked up to an old NTSC CRT TV. When I first installed the OSes, I pressed "4" on my keyboard to get composite video out, and NOOBS prompted me if I wanted to save this setting. Great. The OSes installed, and I was prompted to pick one to boot into. Everything worked as expected.
Next, I rebooted, but no video out signal through the component port this time. The first OS that NOOBs boots to goes straight to CLI, and I was able to login and reboot (sans monitor), so I know everything is working except for the composite video out.
On the next reboot, I held the Shift key to enter recovery mode, and pressed "4", and voila, I have video again. Selected the OS from the last step, and the video signal goes out again.
So...I know I can force video out through the composite port by editing the config.txt on the booted OS, but can anyone help me with the NOOBS bootloader? I can't find any documentation on the subject; other than I can edit noobs.conf on the SETTINGS partition and use the
display_mode setting, but none of the examples tell me what numbers correspond to which video mode (I assume they're the same order as hitting the keyboard in recovery mode, but zero-indexed, so "3" for NTSC?)
Ugh, so frustrating. I'd appreciate any help anyone could give!