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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1829805 Title: Lubuntu Eoan Daily Image fails to boot after install on KVM Status in linux package in Ubuntu: Confirmed Bug description: Context: The live environment appears to function properly and install proceeds as expected with no noticeable errors. Expected results: After a system reboot the virtual machine enters the graphical environment Actual Results: After rebooting the virtual machine a kernel panic error screen appears. I will attempt to attach the screenshot after submitting this bug report. The collected data is from the live environment as the installed environment will not boot. lubuntu@lubuntu:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Eoan Ermine (development branch) Release: 19.10 Codename: eoan lubuntu@lubuntu:~$ apt-cache policy grub2 grub2: Installed: (none) Candidate: 2.02+dfsg1-12ubuntu2 Version table: 2.02+dfsg1-12ubuntu2 500 500 cdrom://Lubuntu 19.10 _Eoan Ermine_ - Alpha amd64 (20190519) eoan/universe amd64 Packages 500 http://archive.ubuntu.com/ubuntu eoan/universe amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: grub2 (not installed) ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6 Uname: Linux 5.0.0-13-generic x86_64 ApportVersion: 2.20.10-0ubuntu27 Architecture: amd64 CasperVersion: 1.407 CurrentDesktop: LXQt Date: Tue May 21 00:30:39 2019 LiveMediaBuild: Lubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190519) SourcePackage: grub2 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829805/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp