Installing gnome-shell-extensions will make Gnome Classic the default session at login time

[Ubuntu Tinkerer]

I performed a fresh install of Ubuntu 17.10 (fresh Ubuntu system partition) but kept my home partition and home folder from Ubuntu Unity 17.04. I've so far done minimal changes to my system besides from installing some apps.

If you install gnome-shell-extensions then Gnome Classic will be enabled as a session that the user can choose at login-time. Not only that, but it will also become the session chosen by **default**.

When the user logs out and back in its very likely that they miss that Gnome Classic was chosen. When the login is completed the user will be confused because they are presented with a Ubuntu 17.10 that looks ugly and doesn't work correctly.

Gnome Classic shouldn't be enabled by installing gnome-shell-extensions, or shouldn't atleast become the session chosen by default upon logging in.

What makes this bug serious is that most users, and especially novice ones, won't know what happened (and how easily fixable it is) because the default choice of session is so discrete in the login GUI.

Kind regards, Arash

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: ubuntu-release-upgrader-core 1:17.10.7
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 21 01:32:32 2017
InstallationDate: Installed on 2017-10-19 (1 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: release-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Tinkerer (rationaltree)]

Removed chosen package since this bug doesn't concern that package