You could also be in a fun grey area where your 6600XT will sometimes reset properly and allow the physical host to reclaim it for its own purposes. Or not and

You could also be in a fun grey area where your 6600XT will sometimes reset properly and allow the physical host to reclaim it for its own purposes. Or not and require a full forced shutdown and reboot to restore proper function. Let's just say I'm very aware of AMD's issues in this area :P Also looking glass is pretty great though it's use of the Desktop Duplication API seemed to carry with it a huge performance hit. Or rather did the last time I used it (it's been a while)