Trying to daisy chain through a displayport 1.2 but the second monitor is always just a mirror. My computer does not have a DP 1.2 so I am trying to use the plugable 4k displayport adapter on my USB 3. According to Dell, my two U2414H can daisychain. The first monitor works fine but when I daisychain to the second, it simply mirrors rather than extends (resolution on both is good). (I have turned on the DP 1.2 on the first monitor and have it off on the second as instructed.)
I can get the dual monitors to work if I attach one through the USB 3/DP adapter and the second through HDMI but the resolution is no longer high on the HDMI monitor and the goal was to daisychain for simplicity sake.
Any ideas on how to fix or is this a video card limitation on my laptop?