Screenshot only shows desktop background or completely black (12.04)

[Liane Dubowy]

> Hello,
>
> I want to make a couple of screen shots of running applications. When I
> press the print screen button it makes a screen shot sound and I get the
> dialog window for saving the screen shot, but nothing is in it. Previously
> it only showed my desktop background but now it is completely black.
>
> I tried installing another application called Shutter but this program has
> the same behavior. I am running Ubuntu Desktop 12.04 LTS inside a Virtual
> Box environment on a Windows 7 host system. I already asked for some
> support over at Virtual Box but I got referred back to Ubuntu being told
> it must be a guest problem.
>
> I hope somebody can provide a solution for my problem.
>
> Kind regards,
>
> Hans Vos
>
>
Hi,

I have the same problem and already tried installing the guest additions 
within the VM. The problem seems to be the 3D-acceleration. If I 
deactivate the option in my Virtualbox-settings, I can make screenshots 
like before with every application I try (shutter, screencloud..). I 
know this is just a workaround because obviously withour 3D you are back 
to Unity-2D as Unity needs it..

If anybody has a solution to this, I'd be interested.

Best regards,
Liane