I've got few displays U2414H. And got a strange issue with them. Some of U2414H went to Power save mod when connected via a DP->miniDP cable. Dp to laptop or dockstation, mdp to display. It's occasional bug, and happens random at different OS and laptops. I have caught that bug at Dell 6320 with ubuntu/win7, dell 7440 with Ubuntu14.04/win7 and Dell 7240 with win7/kubuntu. The normal functionality for a while can be reached by unplug power cable from display, and plug that cable back. If i use hdmi port on display - its, works fine. With mdp port same problem. Symptoms just like on that video: www.youtube.com/watch;feature=youtu.be
Dp 1.2 function is off, No chain. Is that known issue? How i can fix that?
Serial numbers of problem displays:
CN0-9TG46-74261-3CD-1PPL 12/13/13
CN0-9TG46=74261-48K-22UL 8/20/14
CN0-9TG46-74261-48Q-A8DL 8/26/14
CN0-9TG46-74261-4A6-4D4L 10/6/14
CN0-9TG46-74261-4A6-6DTL 10/6/14
CN0-9TG46-74261-4A6-7NTL 10/6/14
