Comment 0 for bug 1816753

Upon reading an Ubuntu page that said it was possible to upgrade my Ubuntu-under-Windows 10 install (WSL) from 16.04 LTS just by running do-release-upgrade, I excitedly went to my terminal and ran the command.

First it refused to run because system was not fully updated. Fine, I ran:
sudo apt update
sudo apt dist-upgrade

This process completed without any errors. I then ran do-release-upgrade again. This time it started okay and got through most of the process.

But then at some point it decided to run grub even though I am running Ubuntu under WSL, so presumably grub should not be used. It did apparently detect that it wasn't needed, because it asked me if I was sure I didn't want to install it on the boot device. I answered yes. Then the install proceeded to LXD but soon after came an error related to grub.

After that it went downhill fast with at least 2 other errors.

Additionally, when the system attempted to roll back the upgrade I got an error from a kernel package.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: friendly-recovery 0.2.38ubuntu1
ProcVersionSignature: Microsoft 4.4.0-17763.253-Microsoft 4.4.35
Uname: Linux 4.4.0-17763-Microsoft x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
Date: Tue Feb 19 23:50:44 2019
Dmesg: [ 0.017808] Microsoft 4.4.0-17763.253-Microsoft 4.4.35
ErrorMessage: installed friendly-recovery package post-installation script subprocess returned error exit status 1
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.04
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.1
 apt 1.6.8
SourcePackage: grub2
Title: package friendly-recovery 0.2.38ubuntu1 failed to install/upgrade: installed friendly-recovery package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2019-02-20 (0 days ago)