Hey Sam, As I mentioned in comment #4, this occurred due to the fact a newer kernel (4.15~94.95), was installed as a result from the dist upgrade. It would appear that you have enabled -proposed in /etc/apt/sources.list, which is the reason why in your logs. the 4.15.0-94.95 kernel is trying to install.
zipl.conf updated the configs to boot from the newly installed kernel. As a result the linux-fips kernel takes a back seat and is moved up in the boot order from kernel #0 -> kernel #1 DEBUG - Processing triggers for ureadahead (0.100.0-21) ... DEBUG - Processing triggers for ureadahead (0.100.0-21) ... DEBUG - Processing triggers for linux-image-4.15.0-94-generic (4.15.0-94.95) ... DEBUG - Processing triggers for linux-image-4.15.0-94-generic (4.15.0-94.95) ... DEBUG - /etc/kernel/postinst.d/initramfs-tools: DEBUG - /etc/kernel/postinst.d/initramfs-tools: DEBUG - update-initramfs: Generating /boot/initrd.img-4.15.0-94-generic DEBUG - update-initramfs: Generating /boot/initrd.img-4.15.0-94-generic DEBUG - Using config file '/etc/zipl.conf' DEBUG - Using config file '/etc/zipl.conf' DEBUG - Building bootmap in '/boot' DEBUG - Building bootmap in '/boot' DEBUG - Adding IPL section 'ubuntu' (default) DEBUG - Adding IPL section 'ubuntu' (default) DEBUG - Preparing boot device: vda (0000). DEBUG - Preparing boot device: vda (0000). DEBUG - Done. DEBUG - Done. DEBUG - /etc/kernel/postinst.d/zz-zipl: DEBUG - /etc/kernel/postinst.d/zz-zipl: DEBUG - Using config file '/etc/zipl.conf' DEBUG - Using config file '/etc/zipl.conf' DEBUG - Building bootmap in '/boot' DEBUG - Building bootmap in '/boot' DEBUG - Adding IPL section 'ubuntu' (default) DEBUG - Adding IPL section 'ubuntu' (default) DEBUG - Preparing boot device: vda (0000). DEBUG - Preparing boot device: vda (0000). DEBUG - Done. DEBUG - Done. DEBUG - Leave Shell::ssh This is not a bug and working as expected, moving testing of thie kernel to ckct. ** Changed in: ubuntu-kernel-tests Status: New => Invalid ** Changed in: linux (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845632 Title: After dist-upgrade, s390x running X-fips/B-fips kernel will boot into generic kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1845632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs