External Monitor Is Not Detected until the Display Output Mode Is Manually Selected Using a USB Type-C Dongle on Alienware X17/X15 R1

You may experience the following symptom when connecting to an external display:

• The computer may not automatically detect the external monitor.

If you own an Alienware x15 R1, or Alienware x17 R1 laptop, and have set this configuration:

• The laptop screen supports the Nvidia Dynamic Display Switch (DDS) feature.
• You have entered the BIOS and enabled the Discrete Graphics Processing Unit (dGPU) mode.
• The external Monitor is connected using the Thunderbolt port on the computer.

Enabling dGPU mode puts the integrated Intel graphics into power-saving mode. When the BIOS is set to use the discrete Nvidia graphics, monitor auto detection is disabled.

If you are looking to resolve this:

• You may be able to enable detection, by pressing either Win + P, or Fn + F8 to select a video output display mode manually.
• You can disable the dGPU mode in the computers BIOS. Check you User Manual of your computer to navigate the BIOS and change the dGPU mode.
• You can use a different cable and another port such as HDMI or DisplayPort on the computer that supports external graphics.
• Further support and solutions can be found in How to Troubleshoot Multiple Monitor Issues and How to Set up Multiple Monitors in Microsoft Windows 11 and Windows 10