I am not able to connect my laptop (Dell XPS 15 L501x) to an external VGA monitor. My computer have a Intel HD graphics Core i5, and a nvidia GeForce GT 420m.
I'm using a HDMI to VGA adapter, which seem to be working good (tried with a Lenovo Laptop and it worked).
The monitor es a HP V193.
When i check in the graphics properties it says Monitor/TV Settings are not supported.
I have attached my system configuration in case is needed.
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Even though you may use an adapter cable to connect your laptop to an external monitor, HDMI* to VGA,we cannot guarantee that it will work since a straight-through connection with a cable is recommended. In other words, these cables may or may not work with your computer.
Also, the connection you are using might not be supported by your system. It is recommended to check with your computer manufacturer whether your computer supports these TV cables and what TV cables are validated to work with your computer.
Because the external monitor works with another system, this is most likely a computer limitation. You can troubleshoot this issue by using a different cable/adapter if one is available to you.