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I am running Sun VirtualBox on a Windows 7 64-bit machine.

I have installed Xubuntu 10.4 as a virtual machine but cannot seem to find an easy way of altering the screen resolution. Any ideas?

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migrated from serverfault.com May 10 '10 at 3:05

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This is a very thorough script to cover the issue: stackoverflow.com/questions/10725867/… –  Dogbert May 23 '12 at 19:58
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3 Answers 3

The issue is with VirtualBox.

You simply need to go to Devices » Install Guest Additions when you have Xubunutu running. This updates the OS.

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Yes. You will have to install the guest additions once on every virtual machine, to enable full support for video and other drivers. –  iglvzx Nov 3 '11 at 6:04
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Try to play with cvt and xrandr, short howto here: http://www.ubuntugeek.com/how-change-display-resolution-settings-using-xrandr.html

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Try to edit /etc/X11/xorg.conf

in the following section, add the three lines with similar values for your convenience:

"Monitor"
    HorizSync       30.0 - 70.0

    VertRefresh     50.0 - 160.0

    Option         "PreferredMode" "1280x1024"

Be carefull with this values because they can destroy your monitor - have a look at the technical details for horizontal/vertical refresh rates.

Or connect your monitor with dvi-plug instead of vga.

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