The problem here is the installer failed to build/install initrd.img. After installing into a LVM LV via libvirt and seeing the error I mounted the disk image contained in the LV and explored:
$ sudo losetup -f --show -P /dev/VG02/lubuntu1910 /dev/loop5 $ sudo mount /dev/loop5p1 /mnt/target $ sudo TERM=screen chroot /mnt/target # ls -l /boot/ total 13548 -rw-r--r-- 1 root root 224306 Jun 4 16:22 config-5.0.0-17-generic drwxr-xr-x 5 root root 4096 Jun 18 20:50 grub lrwxrwxrwx 1 root root 27 Jun 18 17:41 initrd.img -> initrd.img-5.0.0-17-generic lrwxrwxrwx 1 root root 27 Jun 18 17:41 initrd.img.old -> initrd.img-5.0.0-17-generic -rw-r--r-- 1 root root 182704 Jan 28 2016 memtest86+.bin -rw-r--r-- 1 root root 184380 Jan 28 2016 memtest86+.elf -rw-r--r-- 1 root root 184840 Jan 28 2016 memtest86+_multiboot.bin -rw------- 1 root root 4378278 Jun 4 16:22 System.map-5.0.0-17-generic lrwxrwxrwx 1 root root 24 Jun 18 17:41 vmlinuz -> vmlinuz-5.0.0-17-generic -r--r--r-- 1 root root 8703736 Jun 18 20:50 vmlinuz-5.0.0-17-generic lrwxrwxrwx 1 root root 24 Jun 18 17:41 vmlinuz.old -> vmlinuz-5.0.0-17-generic Notice the symlinks from initrd.img{,.old} point to non-existent initrd.img-5.0.0-17-generic, -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1829805 Title: Lubuntu Eoan Daily Image fails to boot after install on KVM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829805/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs