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Higher screen resolution in VirtualBox?

I believe I've successfully got Ubuntu 10.04 installed as the guest OS with Vista as host on my laptop. But I have been unable to get it to use the entire monitor. In Ubuntu and using the System-> Monitor Preferences, I have one monitor "Unknown" with a resolution of 800x600 and haven't found out how to change it to use the full 1920x1200 of my laptop.

I'm using Oracle's VM VirtualBox.

I am new to ubuntu (and *nix in general), so I could be missing something easy.

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marked as duplicate by Marco Ceppi Sep 20 '10 at 22:17

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What virtual machine software are you using, e.g. QEMU, or VMware? –  ændrük Sep 20 '10 at 19:22

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up vote 4 down vote accepted

You need to install Guest Additions if you are using VirtualBox or a similar feature if it's some other virtualization software.

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