I'm running Mint 9 Isadora in a Virtualbox VM (VM was given to me as part of the project). My current system has a nVidia GTX 560Ti graphics card.
I tried to enable 'Extra' in the Appearance > Visual Effects section, which then comes up with a dialog saying 'Searching for drivers' and then after 15 seconds or so, it says 'Desktop effects could not be enabled'.
I went into the terminal and typed compiz-check and got:
Distribution: Linux Mint 9
Desktop environment: GNOME
Graphics chip: InnoTek Systemberatung GmbH VirtualBox Graphics Adapter
Driver in use: vesa
Rendering method: AIGLX
Checking if it's possible to run Compiz on your system... [SKIP]
Checking for hardware/setup problems... [SKIP]
At least one check had to be skipped:
Error: vesa driver in use
When I ask to know more, it says 'The vesa driver is not capable of running Compiz, you need to install the proper driver for your graphics card' and when I check for proprietary drivers, it finds nothing.
I've enabled 3D acceleration in the VirtualBox settings and installed Guest Additions (Wouldn't work from the VirtualBox menu so installed from the Terminal. Is there a way of double checking I installed them just to be sure?)
I'm all out of ideas and not sure what to try that might get it to work but won't break my VM.