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After upgrading to 12.10 and installing VirtualBox guest additions, they cannot be enabled in the Additional Drivers pane.

If I click the only available option, "Continue using a manually installed driver, the Apply changes button will stay grayed out, and the current selection seems to be Do not use the device (though it's grayed out.)

Any idea about this?

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I think you running virtualbox 1.x version upgrading to 2.x might solve the issue. Try out –  devav2 Oct 24 '12 at 13:36
    
1.x, 2.x? Are you talking about the actual virtualbox in my host system? That's 4.1.20. –  Salvatore Iovene Oct 24 '12 at 13:39
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oops sorry. Yes upgrade virtualbox to 4.2. virtualbox.org/wiki/Downloads –  devav2 Oct 24 '12 at 13:48
    
Thanks, that worked. –  Salvatore Iovene Oct 24 '12 at 14:11
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2 Answers

up vote 4 down vote accepted

Upgrading virtual box will solve this issue.

Download virtual box 4.2 from here. Uninstall and reinstall the guest additions.

Here is the changelog of 4.2.2 related to Linux

  • Linux hosts / guests: Linux 3.7-rc1 fixes
  • Linux Additions: support X.Org Server 1.13
  • Linux Additions: fixed a hang when the X server was restarted with old guest kernels
  • Linux Additions: fixed a VBoxService crash during CPU hot remove
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There is a forum post on the VirtualBox forum directly related to Ubuntu Desktop 12.10 and getting 3D acceleration working properly. There are definitely some mixed results.

Ubuntu 12.10 "Virtually" Unusable

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