It works if you disable the "DynamicTwinView" option. You must edit the file /etc/X11/xorg.con and add the following line in Section "Screen":
Option "DynamicTwinView" "False" Here is an emxample of my xorg.con: Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "TwinView" "0" Option "TwinViewXineramaInfoOrder" "CRT-1" Option "metamodes" "1440x900_75 +0+0" Option "DynamicTwinView" "False" SubSection "Display" Depth 24 EndSubSection EndSection -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/980680 Title: login screen stuck at 60Hz with CRT monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/980680/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs