How to get Cinnamon working in Virtualbox?

I installed Ubuntu 11.10 (32-bit) in VirtualBox 4.1.8.

I wanted to install Cinnamon, so I did and I have the option to choose it from the login screen, as well as GNOME options.

If I choose Ubuntu I get Unity, which works fine. GNOME also works. But when I choose Cinnamon, the screen goes black and nothing responds and I have to reset the virtual machine.

I have already installed Ubuntu 11.10 (64-bit) onto the PC in a separate partition (currently running 10.10 but trying out 11.10) and in that Cinnamon works perfectly. In VirtualBox I have 3D settings enabled and gave the virtual machine 128 MB graphics RAM, and 1024 MB system RAM.

What settings should I change or what should I do to get Cinnamon working in Ubuntu in VirtualBox?

I have also tried doing it in LinuxMint 12, but I get the same problem, just a black screen when selecting Cinnamon.

So are Cinnamon and VirtualBox incompatible?

The forums suggest this isn't possible as of now:

Cinnamon doesn't run inside VirtualBox yet; version 1.5 will, but that is version 1.5

For now, you are stuck with Mate or Gnome Shell (I suggest you to Update Mate to version 1.4; it is way better than Gnome shell) and wait for Mint 13 to come out since Maya will have fixed Cinnamon to work with VirtualBox. Nothing to do until then. Sorry I can't be of more help.

To run Cinnamon in VirtualBox on Windows, I've had to check the PAE/NX in Processor tab in System settings.

Cinnamon works (assuming your hardware isn't the issue). Go to the Display section under Guest OS Settings, and enable 3D Acceleration.