Hello Elvis, I have came across something that may interest you, here [1]. The Dell support person there states that you should have the DSP 1.2 enabled only on the primary monitor, on the secondary it should be disabled.
[1] http://en.community.dell.com/support- forums/peripherals/f/3529/t/19563839 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1104230 Title: DisplayPort 1.2 MST support is missing in the Intel driver To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1104230/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
