I've confirmed that this is the case. The Pi refreshes the kernel to 179, reboots and tries to run the 179 kernel with the 156 DTBs. We're not maintaining DTB backwards compatibility, so not a kernel problem.
** Changed in: linux-raspi (Ubuntu Focal) 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/1888691 Title: [uc20] rpi4 does not boot with armhf on recent 5.4 kernel snaps To manage notifications about this bug go to: https://bugs.launchpad.net/snapd/+bug/1888691/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs