I use KaOS at home as my primary OS, while at work I have a Windows 7 workstation.

I created a virtual machine (using VirtualBox) for KaOS, just before the last two major updates (cannot remember the dates, the last two months, perhaps) I used to have KaOS displayed as a full screen (of course I run the virtualbox guest additions).

This time when I run the guest additions, I do not get the same effect and I cannot run the guest operating system at full screen.

here the message I got from the installation, is there anything I can do to get the full screen operating system again?

Verifying archive integrity... All good.

Uncompressing VirtualBox 4.3.12 Guest Additions for Linux............

VirtualBox Guest Additions installer

Removing installed version 4.3.12 of VirtualBox Guest Additions...

Copying additional installer modules ...

add_symlink: link file /usr/lib/VBoxGuestAdditions already exists

Installing additional modules ...

As our installer does not recognize your Linux distribution, we were unable to

set up the initialization script vboxadd correctly. The script has been copied

copied to the /etc/init.d directory. You should set up your system to start

it at system start, or start it manually before using VirtualBox.

If you would like to help us add support for your distribution, please open a

new ticket on http://www.virtualbox.org/wiki/Bugtracker.

Removing existing VirtualBox non-DKMS kernel modules ...done.

Building the VirtualBox Guest Additions kernel modules

Building the main Guest Additions module ...done.

Building the shared folder support module ...done.

Building the OpenGL support module ...done.

Doing non-kernel setup of the Guest Additions ...done.

You should restart your guest to make sure the new modules are actually used

As our installer does not recognize your Linux distribution, we were unable to

set up the initialization script vboxadd-service correctly. The script has been copied

copied to the /etc/init.d directory. You should set up your system to start

it at system start, or start it manually before using VirtualBox.

If you would like to help us add support for your distribution, please open a

new ticket on http://www.virtualbox.org/wiki/Bugtracker.

As our installer does not recognize your Linux distribution, we were unable to

set up the initialization script vboxadd-x11 correctly. The script has been copied

copied to the /etc/init.d directory. You should set up your system to start

it at system start, or start it manually before using VirtualBox.

If you would like to help us add support for your distribution, please open a

new ticket on http://www.virtualbox.org/wiki/Bugtracker.

Installing the Window System drivers

Warning: unknown version of the X Window System installed. Not installing

X Window System drivers.

...done.

Installing graphics libraries and desktop services components ...done.

It was a VirtualBox problem with the 4.3.12 release

Bets regards

Can you clarify? You mean it was a Windows issue, where you used the older virtualbox?

KaOS has been on 4.3.14 for a while, so seems it can't be an issue with 4.3.12