Oh. How did you do this? Are you using an NVidia GPU? Does XRandR work? I couldn&#x27;t get this to work at all, though I was using the closed drivers (since I couldn&#x27;t find any evidence CUDA works with the open ones). Do you need the open drivers for this?<p>In the end I spent £30 on a second GPU. Problem solved... ish. XRandR still didn&#x27;t work, and GNOME3 switched to fallback mode, which is basically GNOME2, i.e., a totally different window manager and a totally different shell.<p>I have no opinion on the performance on Windows vs that on Linux (not a concern, hence the £30 GPU...) but this whole situation was certainly a <i>lot</i> less hassle on Windows ;)