I am using Virtual Box 5.0.0(Windows Vista) to run Ubuntu 14.04. The screen is too small (640x480) but the screen can up to 1280x768. How can I resizing it?


3 Answers 3


You need to install the VirtualBox Guest Additions into Ubuntu. This gives a few benefits, including resizing the Ubuntu screen to match the host window.

Start the VM, then select from the VirtualBox menus:

Devices ⇒ CD/DVD Devices ⇒ VBoxGuestAdditions.iso

Then follow the instructions.

  • 2
    Note that you may also need to increase video RAM for the VM to get desired results
    – Elder Geek
    Aug 14, 2015 at 1:50
  • Seems obvious, but also keep in mind to change the resolution in the guest OS.
    – Aritz
    Apr 10, 2018 at 10:02
  • 1
    Under Virtualbox 6.0.4 on MacOS, the menu would be: Devices -> Insert Guest Additions CD image
    – Bon
    Feb 3, 2019 at 12:30
  • In version 6.0 of Virtual Box the menu is Devices -> Insert Guest Additions CD image... then you will have to authenticate for the installtion to happen.
    – thanos.a
    Oct 29, 2019 at 17:49

Try this: Setting-->Display-->Scale Factor, change it


I encountered the same problem on my PC recently. This is my solution;

Go to the Ubuntu machine:

Settings ⇒ Display ⇒ Graphics controller ⇒ Choose (VBoxSVGA or VBoxSVGA)

My original settings which caused the problem was VMSVGA.

This solution worked on my PC. I cannot guarantee that it will work on yours.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.