Comment 4 for bug 1631519

A monitor attached to the Thinkpad x230 via the docking station DVI port is fine (boots to X and no crazy window trails). This is seen when attaching a monitor via DP on the dock or mDP from the laptop. I was using an mDP to HDMI cable or a DP to DualLink-DVI adapter to connect monitors when I found this issue. Multiple monitors were tried and all experienced the issue when connect to the monitor's HDMI port from the laptop's mDP port.