Choppy and pixelated picture when casting from Windows to TV screen

[Bhaskar Chattopadhyay]

I am trying to cast (Windows + K) my laptop screen on my TV screen, and the picture is choppy and pixelated whenever there's motion on screen. My laptop is an LG Gram 17 with 16:10 aspect ratio. My TV is a TCL Roku 65R635-CA 4K with 16:9 aspect ratio. When I cast, the display settings on the two displays are as below -1. On the internal display (my laptop), the desktop mode is 1920x1080, 60hz and the active signal mode is 2560x1600, 60hz (only one option of refresh rate - 60hz)2. On the second display (my TV), the desktop mode is 1920x1080, 30hz and the active signal mode is 1920x1080, 30hz (t

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