I did some additional testing and found another defect with the current linux-firmware-raspi2 version 1.20200601+arm64-0ubuntu2~18.04.1.
The Pi 400 and CM4 models are not correctly identified: Pi 400: ubuntu@ubuntu:~$ tail -4 /proc/cpuinfo Hardware : BCM2835 Revision : c03130 Serial : 100000008a8f5e8e Model : Raspberry Pi ? Rev 1.0 Pi CM4: ubuntu@ubuntu:~$ tail -4 /proc/cpuinfo Hardware : BCM2835 Revision : c03140 Serial : 10000000535a0643 Model : Raspberry Pi ? Rev 1.0 After upgrading to 4-0ubuntu0~18.04.1 from bionic-proposed all seems fine: ubuntu@rpi-400-rev1d0-5e8e:~$ tail -4 /proc/cpuinfo Hardware : BCM2835 Revision : c03130 Serial : 100000008a8f5e8e Model : Raspberry Pi 400 Rev 1.0 ubuntu@rpi-cm4-rev1d0-0643:~$ tail -4 /proc/cpuinfo Hardware : BCM2835 Revision : c03140 Serial : 10000000535a0643 Model : Raspberry Pi Compute Module 4 Rev 1.0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1940400 Title: [SRU] Pi 4B 2GB boot failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware-raspi2/+bug/1940400/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
