Windows 10: Surface pro 4 additional screen only connects via docking station. Minidisplay port on...

End of October my SP4 connected to external monitors via the minidisplay port on the SP.


This was after 14/10/2019 update => 2019-10 Cumulative updates for .NET Framework 3.3 and 4.8 for Windows 10 version 1903 for x64 (KB4524100)


on 07/11/2019 update =>2019-10 Cumulative updates for .NET Framework 3.3 and 4.8 for Windows 10 version 1903 for x64 (KB4522741) was installed and (unfortunately for me, over 10 days later I noticed that I could no longer connect a second screen via the minidisplay port.


When connecting a second screen via the minidisplay port, Windows-Settings-Display Settings detects the two screens, and even allows me to drag a window from the main screen up into the second screen attached, but the second screen attached to the minidisplay port either says "no signal" or is just black (depending on the monitor connected.


I have tried VGA and HDMI on various screens (and of course as soon as I flip the connection to the docking station all works OK. As a last resort, one of my monitors takes DVI and this did give a poor signal (poor colour with lines) when connected to the minidisplay port.


All secondary screens work if connected via the surface dock.


Having been on the phone to MS Support the conclusion is:

* Nothing wrong with minidisplay port hardware

* Issue lies with MS updates that have interfered with the display driver (same driver used for the docking station, but the docking station uses different firmware)

* MS advises, as I am over the 10 rollback time frame, to basically do a disaster recovery....re-install windows 10, which basically means reinstall everything on my SP or wait until a fix occurs which is why I am posting this in a vague hope some MS techi might pick this up and generate a fix. The first is not an option and I fail to see why I should have the hassle of rebuilding my SP down to an MS lack of testing


Anyone else have this issue and managed to resolve?

:)

 

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