Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I know similar questions have been asked before about setting the VirtualBox guest resolution, but I haven't been able to find an answer to my custom case.

I've installed VirtualBox on my Windows 7 laptop, and I'm trying to run Kubuntu as a guest. The windows resolution is 1366x768, and I'd like to have Kubuntu use the same resolution when in full-screen mode.

I have successfully installed the Guest Additions package. This lets me configure various high resolutions, but none of them are 1366x768.

I'd like to know if it is possible to add such a custom resolution to Kubuntu. In the old days, it was possible to edit xorg.conf, but I guess that file is no longer created.

I also tried to run "VBoxManage.exe controlvm Kubuntu 1366 768 32" from the host, but this didn't seem to do anything.

Any ideas?

share|improve this question
What version of VBox are you running? – uSlackr Apr 20 '11 at 21:52
up vote 1 down vote accepted

When i have the additions loaded for my linux virtuals, once I have kde running, the screen automatically resize to whatever size I change the window to. So if I go to full screen, i would assume it goes to the full resolution.

Does your virtual resize automatically?

Have you seen this thread?


share|improve this answer
it does, but not to full-screen. When I go to full-screen I get a two black margins, and the kubuntu in the middle at 1024x768. Note - my screen height is 768. – DanJ Apr 20 '11 at 18:54
I edited my answer to add a link to a vbox forum thread – uSlackr Apr 20 '11 at 22:04
great! this post… worked. thank you. – DanJ Apr 22 '11 at 6:59

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

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