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After a recent windows update (though may not be the issue), I am unable to run Ubuntu in the virtualbox with full screen mode. I can no longer stretch the window to any resolution. It is locked at 1024x768 in the guest window (Ubuntu). For sanity, I re-installed The Linux Guest Additions. I also tried uninstalling it and reinstalling it even though the script does this for you. No matter what, I can't get past the limited 1024x768 workspace. Furthermore, I noticed that xorg.conf is not in the /etc/X11 folder but I believe this is normal as my other PC running a similar setup also does not have xorg.conf yet scales the guest window of Ubuntu properly to any resolution (including true full screen mode). I have set the guest settings to 64MB video space and also tried 128MB. No difference there. I also tested running Virtualbox 4.1.8 (to try an older working version). Nothing. Now I am back to Vbox version 4.1.12 with no avail.

I am also unable to run the Ubuntu Desktop with advanced effects. Maybe the Linux Guest Additions is not running even though it is installed? How do I verify this?

Any other suggestions?

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  • FWIW, I installed ubuntu-10.04.4-desktop-amd64.iso into a VirtualBox v4.1.12 VM and full-screen worked immediately after installing the guest additions & rebooting. What distro of 10.10 are you using? Have updates been applied? Could you post uname -a? Apr 17, 2012 at 17:34

1 Answer 1

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try with this:

1. Open terminal and enter the following command: 

sudo apt-get update
sudo apt-get install build-essential linux-headers-$(uname -r)
sudo apt-get install virtualbox-ose-guest-x11 

2. Once installation is finished, restart your virtualBox machine. 

3. Go to System -->Preferences -->Monitors and change the resolution of your screen.

source: http://tutorial.downloadatoz.com/how-to-fix-ubuntu-10-10-virtualbox-guest-additions-problems.html

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  • Thanks! Looks like that would have fixed it with absolute certainty. However, I finally noticed that the install failed without it being very clear. Instead of ending the install with an error message, it states a paragraph before the ending to look into the var/logs for the error pertaining to the install. It was a missing linux-header-generic-xxx file all this time. It's been so long since I had to check for missing dependencies that I guess I got lazy. Thanks for the response. It is the perfect solution for those in the need for this same issue.
    – Frank
    Apr 19, 2012 at 14:42

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