Thank you for reporting this bug and helping to make Ubuntu better. Can you please provide the output of the following command:
$ lspci -nnk | grep -A2 VGA It should say that the video card is using nvidia (closed source, proprietary binary) and not nouveau (free open source). Most advanced features (such as display port) do not work properly under noueau driver. To install the nvidia driver simply go to System > Administration > Hardware Drivers and enables the proposed/suggested driver for your video card. ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- External display through display port not working https://bugs.launchpad.net/bugs/636903 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs