Updating lib/firmware with the ones over https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux- firmware.git/tree/i915 makes all the warning go away.
As per Bug 1847786: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1847786 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939986 Title: Missing firmware files, in Ubuntu 20.04 LTS, for initramfs, when it loads i915 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1939986/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs