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Environment: Lenovo T530 running Windows 7. Have installed Ubuntu 14.04 on a virtual machine using VM Virtual Box. Have installed all the updates from both Virtual Box and Ubuntu.

Problem: While in Ubuntu's desktop and other Ubuntu initiated programs, the window is reduced to about 3x4 inches showing in the middle of the rest of my regular Virtual Box window. I am seeing only the upper right hand of the screen output of what I would normally see. Please help.

I've seen How do I install Guest Additions in a VirtualBox VM?

But, none of these answers works in 14.04.

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I don't think this is a duplicate. When installing the Guest Additions with Ubuntu 14.04 I get "Warning: unknown version of the X Window System installed. Not installing" –  mjaggard Apr 22 at 15:31
This is definitely not a duplicate question (even if the answer is the same). I found this only via searching about screen res problems, and learned here that "guest additions" is the answer. (If I already knew to ask about "guest additions", I wouldn't have had a question/problem.) –  Greg Hendershott Jun 22 at 0:56
The answers aren't even the same. Generally you would use the guest additions iso that can be mounted from the host, but it seems to be specific for 14.04 that you must install via the apt repo for it to work properly. –  flungo Jul 26 at 9:22
I've been having problems with this as well. Guest additions appears to have installed correctly but full screen mode still has a small os display. kraxor, where are you seeing system settings? –  Brian Barrick Sep 1 at 5:33
@BrianBarrick I had the same problem after installing the Guest Additions from the VB menu (Devices -> Install Guest Additions). But after explicitly running the command from the 1st answer below (sudo apt-get install ...) and restarting the VM, everything was Ok. –  Stefan Buynov Nov 25 at 16:00

3 Answers 3

You basically need the Guest additions, log into the VM to install the following packages:

sudo apt-get install virtualbox-guest-dkms virtualbox-guest-utils virtualbox-guest-x11

Finally restart the VM to complete the installation.

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I had the same problem as you. I did these steps, maybe helps you too:

  1. Go to System settings -> Software and Updates -> Additional drivers
  2. Use x86 virtualization solutions...
  3. After that reboot your virtual box

My VirtualBox working perfectly

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Thank you kraxor. –  Rustam Aug 1 at 19:17

On virtualbox you have to install "Guest Additions". There is no need to set a resolution via Ubuntu settings. From your guest window select

Devices -> Insert Guest Additions CD image

In Ubuntu open a terminal, navigate to cd folder (usually /media/VBOXADDITIONS*) and run

sh ./VBoxLinuxAdditions.run

Note that you should have a working compiler gcc/g++

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This fails with an error saying it looks like guest additions had been installed from a different installer or package. The only solution is the answer saying to use apt-get to install the three packages. –  Jistanidiot Jun 25 at 20:00
Exactly the same here trying to install Xubuntu 14.04 64bit on VirtualBox. Installing Guest Additions from mounted CD image is not working - it breaks X Server installation. Instaling with apt-get from public repositories as advised by Sylvain works. –  ZeC Jul 31 at 11:36

protected by Sylvain Pineau Sep 19 at 6:40

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