There's a known issue in the Display panel LP: #1224254 As for xrandr, that should not happen. Please reproduce the problem and:
1) type "sudo nvidia-bug-report.sh" and attach nvidia-bug-report.log 2) attach the content of the /var/log/lightdm directory -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/1255832 Title: [NVIDIA GT 640M][10de:0fd2] Unable to adjust the resolution with the proprietary driver To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/1255832/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp