Force 'Duplicate desktops' to stay selected?

[sidewinder]

We have a number of interactive displays in the school, for which we use HDMI and VGA/DVI for the monitor. We use the internal Windows screen duplication to mirror them - zero problems apart from this one.

 

I have one room where randomly (not always) when the display is turned on, the setting changes to 'Show desktop only on display 1' rather than 'Duplicate these displays' - every other computer remembers this fine except this one.

 

The display is a Clevertouch but we have 4 others of the same brand and this is the only room which is affected.

 

Is there a registry setting to FORCE Windows to always duplicate displays when more than one is connected?

Edited September 14, 2016 by sidewinder

[Manny-Tech]

We had this problem using the Clevertouch screens when using a Dell OptiPlex 3020 device. We managed the screen mirroring from the Intel GUI for the driver rather than using Windows. Worth a go? Are all machines connected to the Clevertouch screens the same?

[sidewinder]

Thanks, will give that a try. Yes all but one of the machines connected to the Clevertouches are the same model, brand new PCs.

[CyberDrac]

Not forcing it, but useful to reset on login?

 

displayswitch.exe /clone

[sidewinder]

Thanks, missed this reply sorry. Sadly using the Intel GUI didn't cure the problem.

[sidewinder]

This has started happening on a number of different computers now, some with Clevertouch but also now wityh our Smart displays, which were working without issue before. Presumably, either a Windows update or Intel Gfx driver update has caused this

 

I've just put a shortcut to displayswitch.exe /clone on the affected computers desktops so they can at least solve it easily.

[MrFrostmaul]

We had same issue with Promethean ActivTouch Panels V4, and running a startup script on these computers to set the display as duplicate. Saves alot of time now.