Just to be clear, I was never able to enable (i.e. not grayed out) the GUI checkbox, but I was able to enable the 2D acceleration feature itself by editing the xml, after which it showed up in the GUI as checked but still grayed out.Technologov wrote:I am unable to enable it too on my Windows hosts.
My experience is similar to that of xasx.
Did you try editing the xml? Following my experience I would recommend that you set VRAM to 24MB, shut down all VMs and the GUI, add/edit the accelerate2DVideo="true" manually, THEN REBOOT THE HOST before running the GUI again. Hopefully you will now find that the option is enabled in the GUI, and you can run the guest.
The thing about VRAM is only a suspicion, it seems to need at least 20MB. There doesn't seem to be any other requirement (e.g. it doesn't need VT-x).