After getting Raspberry Pi 4B to work with MAAS images (I don’t use MAAS, just the project’s images,
hw-20.04-edge), I have problems with headless boot. If I have the display plugged in, everything goes well. If I unplug it before starting the Pi, it goes offline after downloading the
squashfs and doesn’t come back. With a display, it does go offline for only about 15 seconds and then comes back online. No matter what I tried the result is the same. I tried to disable the framebuffer, to use the official power adapter, unplug all the devices.
Any idea how to fix it in software? I ordered dummy HDMI plugs as a workaround but I’d prefer a proper solution.