Force duplicate displays on startup?

[Garacesh]

Our Hall machine keeps breaking its screen duplication, for some stupid reason. It still knows the projector is there, but it just keeps reverting to extending the screen.

 

I've tried with Task scheduler:

• Program: C:\Windows\SysWOW64\DisplaySwitch.exe ; Switches: /clone
  
• Program: C:\Windows\Sysstem32\DisplaySwitch.exe ; Switches: /clone
  
• Program: C:\DuplicateDisplay.bat (DisplaySwitch.exe /clone)
  

 

I've tried varying when it applies:

• On Startup
  
• On startup, delayed for 30s
  
• On Login (Any User)
  
• On Unlock (Any User)
  
• On connection from user session (Any User)
  

 

etcetera. All are running as the local admin account, with 'run as highest privileges' set. None of them work.

I've tried running the command manually, the task scheduled manually, and the batch fine manually. All of that works.

 

I'm out of ideas now

[RichCowell]

Do you ever need to use as extended rather Duplicate? Might be worth just whacking a video splitter in so it only ever sees it as one display...

 

Bit of a cop-out, I know... but would work...

[Garacesh]

No dice. It's a wall-mounted AIO unit.

[Joanne]

are people using powerpoint? Mine used to extend when you started a presentation, so I used GPO to disable the extended desktop thing.

[3s-gtech]

Is it used with Powerpoint a lot? The default PP presenter mode can screw with the display settings, which is why I now force that off across the whole school.

 

Joanne posted after me, but she used blue Supporter mode to cheat, obviously

Edited February 28, 2017 by 3s-gtech

[Joanne]

Is it used with Powerpoint a lot? The default PP presenter mode can screw with the display settings, which is why I now force that off across the whole school.

 

Beatcha to it

[Garacesh]

Is it used with Powerpoint a lot? The default PP presenter mode can screw with the display settings, which is why I now force that off across the whole school.

 

are people using powerpoint? Mine used to extend when you started a presentation, so I used GPO to disable the extended desktop thing.

 

Yes and yes. But doesn't the default Presenter Mode only activate if there are multiple independent displays? Seems to be that if you're duplicating, you just get your regular, bog-standard, full-screen presentation on both displays.

[Joanne]

depends who's logged on and if they have set that setting before...

[3s-gtech]

Yes and yes. But doesn't the default Presenter Mode only activate if there are multiple independent displays? Seems to be that if you're duplicating, you just get your regular, bog-standard, full-screen presentation on both displays.

 

By default in 2013 and 2016, it goes to Presenter mode and stuffs it. That'd be my first checkpoint. I'm not sure why your scripts aren't running though, that's very odd. Something not right there. You've put it in the Startup folder in the Start Menu?

[Garacesh]

By default in 2013 and 2016, it goes to Presenter mode and stuffs it. That'd be my first checkpoint. I'm not sure why your scripts aren't running though, that's very odd. Something not right there. You've put it in the Startup folder in the Start Menu?

Not in Startup, no. Redirected start menu etc, didn't think that would work.

 

Is there a GPO to disable presenter mode, or is it a reg key?

 

Print out some info on Windows Key + P to allow users to switch to duplicate and stick it with the Hall machine.

Trying to avoid them doing anything, since they're not used to WinP, as their classroom machines don't break duplication. It's just an issue with this AIO.

Might do a 'DisplaySwitch /Clone' shortcut but I'd rather have a completely hands-off solution if possible.

[Joanne]

Is there a GPO to disable presenter mode, or is it a reg key?

 

GPO, you have to download the ADM files from Microsoft... https://www.microsoft.com/en-us/download/details.aspx?id=49030

 

Don't forget to put the language one in there too, otherwise it won't show up.

 

Policy is in: Powerpoint 2016 / Powerpoint Options / Advanced / Do not allow powerpoint to automatically extend display.

[Michael]

I agree PP 2016 GPO setting is a must.

[3s-gtech]

Not in Startup, no. Redirected start menu etc, didn't think that would work.

 

Should work - I use it to fire SfB up (just initial setup) for everyone and that's redirected. Can be a very powerful way of pushing things out to all users.

[Garacesh]

Should work - I use it to fire SfB up (just initial setup) for everyone and that's redirected. Can be a very powerful way of pushing things out to all users.

Could you elaborate? If I put something in 'Startup' on the machine, it will proc for all users on that machine? Or do I put it in Startup for the redirected start menu which will make it happen to everyone everywhere? (Cause that would be bad, not every machine needs to duplicate )

[Michael]

User Config > Policies > Admin Templates > Microsoft PowerPoint 2016 > PowerPoint Options > Advanced - Do not allow PowerPoint to automatically extend display when presenting on a laptop or tablet - Enabled

[Rob_D]

Or do I put it in Startup for the redirected start menu which will make it happen to everyone everywhere? (Cause that would be bad, not every machine needs to duplicate )

 

If you wanted it to only run on specific machines you could do something like

 

goto %computername%
:end
exit
:MYCOMPUTER
displayswitch /clone
goto end

Replace "MYCOMPUTER" with the name of the target computer.

[LeMarchand]

• Program: C:\DuplicateDisplay.bat (DisplaySwitch.exe /clone)

 

I run this as a startup script (not using TS) and it seems to work - of course, maybe no-one had complained yet.

[Manashty]

Our Hall machine keeps breaking its screen duplication, for some stupid reason. It still knows the projector is there, but it just keeps reverting to extending the screen.

 

I've tried with Task scheduler:

• Program: C:\Windows\SysWOW64\DisplaySwitch.exe ; Switches: /clone
  
• Program: C:\Windows\Sysstem32\DisplaySwitch.exe ; Switches: /clone
  
• Program: C:\DuplicateDisplay.bat (DisplaySwitch.exe /clone)
  

 

I've tried varying when it applies:

• On Startup
  
• On startup, delayed for 30s
  
• On Login (Any User)
  
• On Unlock (Any User)
  
• On connection from user session (Any User)
  

 

etcetera. All are running as the local admin account, with 'run as highest privileges' set. None of them work.

I've tried running the command manually, the task scheduled manually, and the batch fine manually. All of that works.

 

I'm out of ideas now

I did exactly this and it worked:

1. Created a task to run at login with 30 delays.

2. Asked the task to run the following two:

1. C:\Windows\System32\DisplaySwitch.exe /clone

2. Created a run.bat file and put the following in it:

timeout 5

 

The second task, ran after the first one, kind of confirmed the display switch and made it stick.

 

Hope this helped!

[Garacesh]

Bit of a necrobump, this problem was over a year ago!

 

For anyone that finds this thread in future:

are people using powerpoint? Mine used to extend when you started a presentation, so I used GPO to disable the extended desktop thing.

Turns out this was the issue. Forcing that off via GPO solved the problem.

 

The policy in question is:

User Configuration/Policies/Administrative Templates/Microsoft PowerPoint 2016/PowerPoint Options/Advanced

Do not allow PowerPoint to automatically extend display when presenting on a laptop or tablet

Set it to Enabled

Edited June 5, 2018 by Garacesh