Nintendo Pro Switch Controller - Entire controller acts as mouse (Testing in Dark Souls 3)

I can't seem to find any one else on this forum or elsewhere with the same issue I'm having, so I thought I'd ask directly.

When I load up a game (I'm testing with Dark Souls 3), my entire Nintendo Switch Pro Controller -- not the joystick -- acts as a mouse input. Waving the controller around moves the mouse around. I have fiddled with Controller Settings in Steam non-stop and can't seem to correct this behavior. In a game like Dark Souls 3 where the camera control is of paramount importance, it does render the game unplayable.

Has anyone else had this experience and found a solution?

Thanks, Matt

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Why is my Pro Controller acting as a mouse?

Sounds like you have Steam configured with a Desktop Configuration that binds the joystick to mouse movement. Connect your Switch Pro controller and open Steam, then go to Steam menu -> Settings, click "Controller", and click "Desktop Configuration".

How do I use the Switch Pro controller in Dark Souls 3?

Go into Big Picture mode and make sure Switch controller support is enabled (click the cog icon up top right, then controller settings is listed on the left). Then you can either select the game in Big Picture, or exit BP and right-click the game in Steam - selecting Edit Steam Controller Configuration.

How do I use my Switch Pro controller as a mouse?

Open the main Steam window and head to Settings > Controller > General Controller Settings. Check the box for your controller\u2014PlayStation, Xbox, Switch Pro, or Generic\u2014and you should now be able to move your mouse with the right stick on your controller.

How do I disable the mouse in dark souls 3?

Right click on any HID-compliant game controller and select Disable.

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