An HDMI splitter provides the capability to project the same image to multiple screens, which is handy if you’re, say, hosting a big sports viewing party across several TVs or a head-to-head gaming ...
I have a TESmart HDMI KVM 4 port switch and I run Ubuntu and Fedora on two separate laptops that I have plugged in to the KVM. I don't THINK the OS is relevant here. I have an old school 7 row ...