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I am using a Dell Inspiron i7559. For compatibility reasons, I have downgraded the resolution to 1080p from the usual 4K. When I plug my Samsung 32" 1080p Smart TV in via HDMI, even in extend mode, it shows the same amount of content.
More specifically. I expected that dragging a File Manager Window to the TV, for example, would allow the active display of ~4x more content. Instead, the same amount of content is displayed on the Laptop Screen as on the TV! The laptop screen can show 10 horizontal and 6 vertical icons. The TV shows the exact same number, as if it were mirrored! Why is this happening, and how do I achieve the desired display configuration?
If it somehow makes a difference, I'm running Ubuntu 19.04.