During installation it was fine, able to load into the desktop and updating. However after loading some app automatically (steam I guess) in fullscreen, the screen just flickers like every 5 second with a big mouse icon. This happens on both gpu passthrough and VNC. I'm using the latest steamOS iso, with 20 GB and 2GB ram allocated. Since the first install/update, it always boots straight into Steam (Big picture mode?), and alt+tab/win key doesn't do anything..   Update: Created another VM, a