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I'm running Debian as host and I fail to get Debian, Ubuntu, and Fedora guests to be fullscreen. Changing video memory didn't help.

NOTES:

  • I haven't tried any other distro
  • I didn't create WinXP guest myself
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1 Answer

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There are a few things that need to be in place. You need to have guest additions installed on the guest OS. You have to have "guest display auto-resize" feature enabled (Host+g toggles this), and then you have to actually activate full-screen mode (Host+f toggles this).

Specifically, on the Debian/Ubuntu guest, run the following (as root):

apt-get install virtualbox-ose-guest-x11
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Guest additions not being installed is almost certainly the problem – Falmarri Nov 9 '10 at 19:06
Agreed with Falmarri. Most distributions have the guest additions in the repositories, so you can look there first. – Shawn J. Goff Nov 9 '10 at 19:18
I followed the instructions and now I got "Disable Guest Display Auto-resize" and it's not selectable. Any ideas? – Tshepang Nov 9 '10 at 21:49
Are you sure you installed the guest additions correctly? You compiled/installed/restarted? – Falmarri Nov 9 '10 at 23:55
@Fal, must I restart the host as well? – Tshepang Nov 10 '10 at 1:04
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