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Multiple monitors not working in RDS on server 2012

Answered Multiple monitors not working in RDS on server 2012

  • Thursday, December 13, 2012 5:01 PM
     
     
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    Hello.

    I have a Windows 2012 server running RDS. Before RDS was installed a remote desktop session used all available monitors when 'use all my monitors for the remote session' was checked in the RDP client settings.

    After I installed RDS the default session collection had a limit of 16 monitors that I was unable to edit. When I connected to the default session collection I could only get the remote session to display on 1 monitor.

    I deleted that session collection, created a new one, and was able to edit the 'maximum number of redirected monitors' setting to the desired value of 2 but the remote session still only displays on 1 monitor. 

    If the session collection is set to 2 monitors and the RDP client is set to 'use all my monitors' why is the remote session only displayed on 1?

    Thanks.

    Keith

     

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  • Monday, December 17, 2012 6:59 AM
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    Hi,

    Thanks for your post.

    Please try to use RDC 8.0 to connect to the Remote Desktop Server. In addition, you may refer to the following blog to see if any settings restrict the number of monitors.

    Using Multiple Monitors in Remote Desktop Session  (applies to Windows Server 2012)

    http://blogs.msdn.com/b/rds/archive/2009/07/01/using-multiple-monitors-in-remote-desktop-session.aspx

    Best Regards,

    Aiden

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    Aiden Cao
    TechNet Community Support

     
  • Monday, December 17, 2012 3:31 PM
     
     
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    What client OS are you using?

    Don Geddes - SR Support Escalation Engineer - Remote Desktop Services - Printing and Imaging

     
  • Monday, December 24, 2012 9:46 PM
     
     
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    Windows 7 Pro x64. I've installed the RDC 8.0 update and it doesn't make any difference. My laptop is Windows 7 x64 Home Premium (so it's not a domain computer) and the remote session on it uses 2 monitors, so it looks like it's only domain-joined computers that are limited to a single monitor. I created a group policy to limit the number of monitors to 2 but it doesn't make any difference. I've run RSOP and there's nothing there that I can see that could cause this problem.

    I've got a case open with MS. I'll post anything we find here.

    Keith Ketchum


     
  • Thursday, December 27, 2012 7:30 PM
     
     
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    Looks like multiple monitor support in Remote Desktop Services is only supported with Windows Ultimate and Enterprise, not Professional. 
    • Marked As Answer by Keith Ketchum Thursday, December 27, 2012 7:30 PM
    • Unmarked As Answer by Keith Ketchum Thursday, January 03, 2013 9:16 PM
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  • Thursday, January 03, 2013 9:39 PM
     
     
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    I'm continuing to work with MS Support on this, but I thought I'd add an update. The 2012 RDS session will display on multiple monitors on Windows 7 Enterprise, Home Premium, and Professional when they're not joined to the domain. Windows 7 Professional will only use 1 monitor for the remote session when it's a domain-joined workstation. A support tech and I reviewed the resultant set of policies and couldn't find any group policy setting to account for this. Tomorrow an escalation engineer and I will look at it again. I'll also join a Windows 7 Enterprise workstation to the domain and see what happens.

    It appears to me from what I've been able to find that Windows 7 Pro doesn't support multimon when it's the server. It obviously is capable of multimon support as a client, at least when it's not in a domain.

     
  • Sunday, April 28, 2013 11:47 PM
     
     
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    According to Microsoft, this behavior is by design. When the client has multiple monitors and is set to 'use all my monitors for the remote session' all monitors will be used with the default RDS session collection setting. If you try to limit the number of monitors the client will use via the session collection, the client will use only one monitor.  

    It doesn't make sense for it to work that way, but that's the official story.