I am running Kubuntu 14.04 LTS on a Windows 8.1 host, and I am trying to get it to work with seamless mode. Using latest version of VirtualBox.

I have guest additions installed on the guest, and when entering a program and looking at the "view" menu, the "Seamless Mode" line is grayed out. The hotkey combination doesn't work either.

I double checked that the program is focused and things like that, also rebooted a couple of times. Also disabled nested paging.

Is there any way to test if the guest additions are working? Also, what should I do?


Failure to switch to seamless mode indicates a missing or incomplete installation of the guest additions.

Different to Ubuntu we will not have a gcc compiler installed to compile the additions for the guest. This is provided with the package build-essential Install build-essential that we have to install in the guest before we can install the guest additions.

A missing compiler may result in a fail message on running the guest additions install script.

After we had installed the guest additions without an error we need a reboot of the guest to be able to switch the View to Seamless Mode.

  • so what do I do exactly to confirm what's wrong? – Amit Gold Feb 10 '16 at 16:00
  • Got it working, the mouse behaves strangely though, I will play around with it, maybe a resolution problem. – Amit Gold Feb 10 '16 at 16:18

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