I have issue with Dell Latitude E7270. When computer is on docking station, screens don't blink, flicker or do another unusual things, but when I remove laptop from docking station, laptop screen's one upper third starts to flicker(turns from picture to grey snow like on old TV, when antenna are unplugged, for half a second or little bit more). It don't do it all the time, but quite regularly.
Solutions that I tried:
The problem disappears only when plug the laptop on docking station...
I have a 5290 and have flickering issues only when I try to duplicate displays. After I disabled the Intel graphics card I got this lovely screen. Again, before this it was black all the time (I could still tell there was a backlight but no image).