It seems flash-kernel is confused about what DTB to use. No wonder given all the changes with the Pi DTBs :-(
** Also affects: flash-kernel (Ubuntu) Importance: Undecided Status: New ** Changed in: linux-raspi (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/1913309 Title: Error upgrading Ubuntu armhf from 18.04 to 20.04 on RPI4 - package linux-firmware 1.187.9 failed to install/upgrade Status in flash-kernel package in Ubuntu: New Status in linux-firmware package in Ubuntu: Invalid Status in linux-raspi package in Ubuntu: Invalid Bug description: Error upgrading Ubuntu armhf from 18.04 to 20.04 on RPI4 - package linux-firmware 1.187.9 failed to install/upgrade: il sottoprocesso installato pacchetto linux-firmware script post-installation ha restituito lo stato di errore 1 This should be the most relevant part: -------------------------------------------------------------------------- Configurazione di linux-firmware (1.187.9)... update-initramfs: Generating /boot/initrd.img-5.3.0-1008-raspi2 Using DTB: bcm2711-rpi-4-b.dtb Installing /lib/firmware/5.3.0-1008-raspi2/device-tree/bcm2711-rpi-4-b.dtb into /boot/dtbs/5.3.0-1008-raspi2/./bcm2711-rpi-4-b.dtb Installing new bcm2711-rpi-4-b.dtb. Ignoring old or unknown version 5.3.0-1008-raspi2 (latest is 5.4.0-1028-raspi) update-initramfs: Generating /boot/initrd.img-4.15.0-1073-raspi2 Using DTB: bcm2711-rpi-4-b.dtb Couldn't find DTB bcm2711-rpi-4-b.dtb on the following paths: /etc/flash-kernel/dtbs /usr/lib/linux-image-4.15.0-1073-raspi2 /lib/firmware/4.15.0-1073-raspi2/device-tree/ Installing into /boot/dtbs/4.15.0-1073-raspi2/./bcm2711-rpi-4-b.dtb cp: cannot stat '': No such file or directory run-parts: /etc/initramfs/post-update.d//flash-kernel exited with return code 1 dpkg: errore nell'elaborare il pacchetto linux-firmware (--configure): il sottoprocesso installato pacchetto linux-firmware script post-installation ha restituito lo stato di errore 1 -------------------------------------------------------------------------- ProblemType: Package DistroRelease: Ubuntu 20.04 Package: linux-firmware 1.187.9 Uname: Linux 5.10.9-v7l+ armv7l ApportVersion: 2.20.11-0ubuntu27 Architecture: armhf CasperMD5CheckResult: skip Date: Tue Jan 26 14:40:00 2021 Dependencies: ErrorMessage: il sottoprocesso installato pacchetto linux-firmware script post-installation ha restituito lo stato di errore 1 PackageArchitecture: all Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2 PythonDetails: N/A RelatedPackageVersions: dpkg 1.19.7ubuntu3 apt 2.0.2 SourcePackage: linux-firmware Title: package linux-firmware 1.187.9 failed to install/upgrade: il sottoprocesso installato pacchetto linux-firmware script post-installation ha restituito lo stato di errore 1 UpgradeStatus: Upgraded to focal on 2021-01-26 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/flash-kernel/+bug/1913309/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp