[Bug 1800256] [NEW] package grub-pc 2.02-2ubuntu8.7 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 1

Public bug reported: package grub-pc2.02-2ubuntu8.7 failed to install/upgrade Synaptic Package Manager froze during the process. ProblemType: Package DistroRelease: Ubuntu 18.04 Package: grub-pc 2.02-2ubuntu8.7 ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18 Uname: Linux 4.15.0-38-gener

[Bug 1346443] [NEW] System will only start or reboot from the installation disk.

Public bug reported: When I try to boot/reboot the machine I get "Reboot and select proper Boot device or insert boot media in selected Boot device and press any key." The only way I can reboot the machine is to boot from the installation disk and select "Boot from 1st Hard Drive" option. Problem