The strangest one then would be switching from PC Screen Only to Second Screen Only e.g. Making a change using Win+P evidently causes a refresh of the video system. There the workaround is to use the Project dialog (Win+P) to make aĬhange. This sounds related to the symptom that others are seeing with 'No HDMI Signal' (or similar-it's a symptom from the monitor when it is turned on). However, if both are plugged in at the same time the monitor plugged into the Lightning port is no longer recognised by the computer it does not even show up as a device in the device manager window, Intel control panel or display preferences pane. Monitors: 2x DELL U2715H Displays (27' 2560x1440)Ĭomputer: Mid 2014 13-Inch Retina MacBook Pro

I am really hoping I can operate dual external monitors on Windows as I need to be using some Windows specific software for work, and dual displays are much nicer to work with. Looking up the issue I have not found any solutions that work, I have restarted the computer several times, with monitors plugged in and not plugged in, even reset the SMC. Have been recently reinstalled and up to date. All drivers are apparently up to date, both operating systems Running my MBP in Mac OSX, with one monitor plugged into a Lightning port, and another plugged into the HDMI port, both monitors work perfectly (simultaneously), so it is not a hardware issue. Any monitor plugged into the second port (as the only monitor) is not recognised. Window, Intel control panel or display preferences pane.Īdditionally, (only in Bootcamp Windows 10) the second Lightning port on the laptop does not seem to work. However, if both are plugged in at the same time the monitor plugged into the Lightning port is no longer recognised by the computer it does not even show up as a device in the device manager The HDMI port, it also works perfectly as a secondary display. if I have one monitor plugged into a lightning port, it works perfectly as an extended secondary display. When I have two monitors plugged into my laptop running Windows 10 on Bootcamp, only one monitor will be recognised at a time.

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