Thanks for the additional details!
It’s very strange this isn’t working while another active adapter is. The only difference I can see between these adapters is the Benfei adapter is capable of converting from DisplayPort 1.2 to HDMI 1.4 while our adapter converts to HDMI 2.0, however I would not expect this to affect the output.
Additionally our adapter is working when the computer initially posts but not after the system loads, which normally points to a driver conflict between Windows 10 and the legacy Intel Graphics drivers.
Would it be possible to try a few configurations to see if there is any difference in this behavior?
- Boot the computer with only the Plugable DisplayPort to HDMI graphics adapter connected to the system ( disconnecting the VGA cable before powering on the computer ).
- Connect the Plugable DisplayPort to HDMI graphics adapter after the computer has loaded the Windows desktop.
Please let me know if the display is detected in either of these configurations, if the display is not detected in the first configuration, the VGA cable can be reconnected and the VGA display should be detected allowing you to continue using Windows.