How to Increase Screen Size or Resolution in Virtualbox for Ubuntu or Linux

When a new Virtual Machine, or Virtual PC, is setup in Virtualbox for Ubuntu, or another Linux flavor, the screen size and screen resolution may be fixed smaller than your maximum resolution setting. This problem can be fixed by installing Guest Additions.
Guest Additions comes with Virtualbox, but is installed after you setup your Virtual Machine, or Guest OS, to add features such as increased screen size or screen resolution. On the test PC for this example the maximum resolution is 1280 x 1024. After loading Ubuntu under Virtualbox bring up the Display Preference by going into System -> Preferences -> Display. The maximum resolution option listed is 800 x 600.

Installing Guest Additions from Gnome Desktop
To get a bigger screen resolution we will need to install Guest Additions. On the Virtualbox File Menu click on Devices -> Install Guest Additions.

You should now see a vboxadditions_x file now located on your Ubuntu desktop.

To open the vboxadditions file either double click on the file, or right-click and then click Open.

Now double click the autorun.sh file. The vboxadditions file contains installation choices for a few different Linux versions including both 32 bit and 64 bit versions. By using the autorun.sh file you allow the script to automatically detect, and install the right software for your OS.

Now click Run.

The autorun.sh will open a Shell window and begin installing the files.

Once the autorun.sh file has completed installing the Guest Additions software all you have to do is hit Enter to close the Window.

Now reboot Ubuntu for the new files to load properly.

After you return to the Ubuntu desktop click System -> Preferences -> Display.

Under Display Preferences you will see the resolution is at 1152 x 864, which is still not the maximum resolution.

On the Virtualbox File Menu click on Machine -> Fullscreen Mode.

Once in Fullscreen Mode go to System -> Preferences -> Display again, and you will now see the maximum screen resolution is 1280 x 1024.

Installing Guest Additions from the Command Line Terminal Window
To install Guest Addtions from the Terminal window Command Line in Ubuntu click Applications -> Accessories -> Terminal.

At the Bash prompt ($) type:
cd /media/cdrom0
Hit Enter.

Now type:
dir
Hit Enter. This will give you a listing of all the files in the vboxadditions file directory. We want to run the autorun.sh so that script can install the right files for us.

Type:
sudo sh autorun.sh
Hit Enter.
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The autorun.sh file should automatically change the proper permissions to run and install the vboxadditions file that will work on your OS.

The autorun.sh will open a Shell window and begin installing the files. Once the autorun.sh file has completed installing the Guest Additions software all you have to do is hit Enter to close the Window.

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10 Responses to “How to Increase Screen Size or Resolution in Virtualbox for Ubuntu or Linux”
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Great tutorial!
This is only solution published that actually works.
Keep up the good work
Thanks
for those that say it didn’t work. For that matter anybody. After rebooting there is no need to go back to the Display app. Because if your window is still at the 800×600 then the display app will not reflect any new resolution sizes and you be have been deceived into believing the steps outlined here didn’t work for you. So just skip that part and turn on auto resize then resize your window with your mouse or just full screen it. Hope that helps.
Made programing in Java on netbeans so much eaiser
Thanks for this post, it helped me get my screen size bigger.
@Mark , If you don’t get extra screen resolution options, go to Machine -> Auto-Resize Guest Display and then choose Full Screen Mode.
Thank you for the clear instruction! Screen size went right after step “On the Virtualbox File Menu click on Machine -> Fullscreen Mode.”
Yea it didn’t add any new resolutions for me either. I seem to have the problem more often on laptop video cards. Not sure why.
I tried this one but it didnt work for me, help! It didnt add anymore screen resolutions.
Very clear and very helpful!
Thanks!
Thanks Nerdgrind. Clear and effective.
This was the only tutorial I found that worked. It was also one of the only ones that made sense. Thanks!!!