Operator error. I was apparently using the wrong UART. See https://github.com/raspberrypi/linux/issues/3821.
** Bug watch added: github.com/raspberrypi/linux/issues #3821 https://github.com/raspberrypi/linux/issues/3821 ** Changed in: linux-raspi (Ubuntu Focal) Status: New => Invalid ** Changed in: linux-raspi (Ubuntu Groovy) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1893189 Title: Pi 4B doesn't boot with 'earlycon=pl011,0xfe201000' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1893189/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
