In Ubuntu on Virtualbox, the screen is blank after sign-in

[Harry Amarantidis]

I installed xubuntu in my Windows box using the latest VBOX (6.0). It installed perfectly however after I log in the screen kind of freezes. I see the background however the icons and title bar do not appear. Also mouse inputs like right click do not work. Function keys do not work either like alt F2.

Xubuntu system is updated and the guest addons are installed.

I have tried disbling the 3d acceleration however that did not work.

The only way I can get this to load the icons is to go to Devices -> Insert Guest Additions CD Image. Once I click on Insert Guest Additions the icons and title bar load and everything works fine.

I checked online for solutions but have not found any that work.

This also seems to be a problem with other versions of Ubuntu and other Linux distributions.

xubuntu 10.04.1

Description: Ubuntu 18.04.1 LTS
Release: 18.04

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: login 1:4.5-1ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: XFCE
Date: Tue Jan 15 15:20:31 2019
InstallationDate: Installed on 2019-01-15 (0 days ago)
InstallationMedia: Xubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: shadow
UpgradeStatus: No upgrade log present (probably fresh install)

[Serge Hallyn (serge-hallyn)]

Thanks for reporting this bug. This looks to be a bug with either xubuntu login manager or xubuntu default X11 session, so I'm reassigning it to lightdm.