I am getting the same warning messages with the fully-updated 20.04. <snipp>
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_smc.bin for module am dgpu ryzen@cp7:~$ apt policy linux-firmware linux-firmware: Installed: 1.187 Candidate: 1.187 Version table: *** 1.187 500 500 http://us.archive.ubuntu.com/ubuntu focal/main amd64 Packages 500 http://us.archive.ubuntu.com/ubuntu focal/main i386 Packages 100 /var/lib/dpkg/status -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1850654 Title: update-initramfs complains of missing amdgpu firmware files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1850654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs