Now it works, but when i resume my PC i see two screens in one monitor. I think that is a problem of my PC, because when i open Monitor in System Settings i find two monitors connected, but indeed there is only one monitor connected. I opened a new bug here: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331-updates/+bug/1293237
Now it works, but when i resume my PC i see two screens in one monitor. I think that is a problem of my PC, because when i open Monitor in System Settings i find two monitors connected, but indeed there is only one monitor connected. I opened a new bug here: https:/ /bugs.launchpad .net/ubuntu/ +source/ nvidia- graphics- drivers- 331-updates/ +bug/1293237