Boot hangs. about nerves_system_rpi4 HOT 4 CLOSED

The important message is buried in that text:

erlinit: The shell will be launched on tty 'ttyS0'
erlinit: If you would like the shell to be on this tty,
erlinit: configure erlinit with '-c tty1'

Your RPi4 isn't hung. It's just waiting for input on the Raspberry Pi 4's UART pins. This and connecting via ssh are the more convenient setups for development, but it shouldn't be the default for new projects. Do you have a rootfs_overlay/etc/erlinit.conf file that overrides the default tty?

from nerves_system_rpi4.

Thanks @fhunleth. No, I did not override anything.
I'm sorry, I expected iex console because of the documentation:

Now that you have your SD card burned, you can insert it into your device and boot it up. For Raspberry Pi, be sure to connect it to an HDMI display and USB keyboard so you can see it boot to the IEx console.

from nerves_system_rpi4.

You're right. The tty is set to the UART in this system. https://github.com/nerves-project/nerves_system_rpi4/blob/master/rootfs_overlay/etc/erlinit.config#L8. That's inconsistent with our other Raspberry Pi systems. I'll make a PR to fix that.

To get you working more quickly, create a rootfs_overlay/etc directory in your project and add it to your configuration. See https://hexdocs.pm/nerves/advanced-configuration.html#root-filesystem-overlays.

Then copy https://github.com/nerves-project/nerves_system_rpi4/blob/master/rootfs_overlay/etc/erlinit.config to rootfs_overlay/etc/erlinit.config and comment out -c ttyS0 and comment in -c tty1.

from nerves_system_rpi4.

Works fine, thanks.

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