I solved installing the nvidia driver from the nvidia installer (I used the lastest usable non-legacy driver). Be sure to delete all the nvidia related package and the linux-restrincted-module-(generic i386 ...) I think that the previews problem is that the legacy driver is too old!
I solved installing the nvidia driver from the nvidia installer (I used the lastest usable non-legacy driver). Be sure to delete all the nvidia related package and the linux-restrinct ed-module- (generic i386 ...) I think that the previews problem is that the legacy driver is too old!