Here is a related thread on the nvidia site. Some monitors do not respond to DisplayPort power management commands properly.
https://devtalk.nvidia.com/default/topic/791786/dpms-not-working-on- gtx980-with-displayport-connection/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1313539 Title: [DisplayPort] monitor shows black screen and "no input signal" after turning the monitor off and on manually To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1313539/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
