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      Cannot use Triple Display Configuration using two DVI digital ports for Windows 7 - ThinkPad L430, T430s and T430si

      Symptom

      Some ThinkPad systems cannot use Triple Display Configuration when using two DVI digital ports.

      • First Display:  Active ThinkPad Display
      • Second and Third Displays:  Connected to DVI digital ports on ThinkPad Mini Dock Plus

      NOTE: 
      The Triple Display Configuration will work correctly when using two DisplayPorts.  The use of DP to DVI dongles is not a viable solution.The DisplayPortcables must be straight DP to DP connections.

       

      Affected configuration

      The above symptom is associated with, but not limited to, the following systems:

      • ThinkPad

      Affected systems:

      • L430
      • T430s
      • T430si
      • T431s

      System is configured with:

      • Mini Dock Plus

      Operating Systems:

      • Microsoft Windows 7
      • Microsoft Windows 8

         

      Solution

      To enable three displays on these machines, the configuration should be one of the following below:

      1. DisplayPort + DisplayPort + LCD
      2. DisplayPort + DisplayPort + VGA
      3. DisplayPort + DisplayPort + DVI (one DisplayPort is connected to system mini-DisplayPort port)
      4. DisplayPort + DisplayPort + DisplayPort (one DisplayPort is connected to system mini-DisplayPort port)
      5. See the picture below to verify that Intel Control Panel applet detects 3 monitors and 2 of the monitors are listed as Digital Displays.  The use of DP to DVI dongles is not a supported alternative to using DP to DP cables.

       

      Trademarks

      Lenovo, and ThinkPad are trademarks of the Lenovo Corporation in the United States, other countries, or both.

      Microsoft, and Windows are trademarks, or registered trademarks of Microsoft Corporation in the United States and/or other countries.

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      • Alias ID: SF12-T0040
      • Document ID: HT074304
      • Last Updated :17 Jun 2014
      • © 2016 Lenovo