I've been experiencing these same problems when extending my desktop. Cloning the desktop works, but system is unstable for a minute or two. (As described in bug 877438)
chipset: nVidia Corporation GF104 [GeForce GTX 460] (rev a1) nvidia-current: 280.13-0ubuntu6 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/813343 Title: nvidia drivers, second monitor covered by black To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/813343/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
