Not a kernel issue. The grub hook that fails is provided by grub-customizer which only existed in Focal. https://launchpad.net/ubuntu/+source/grub-customizer
That package should probably be removed from the system. ** Changed in: linux-signed (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2100293 Title: package linux-image-5.15.0-118-generic 5.15.0-118.128 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 127 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/2100293/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs