The 4-port KVM switch I purchased works, but it does not broadcast EDID information to all connected devices. So when you switch sources, the previous source behaves as if the monitor was fully unplugged, and the new source behaves as if the monitor is plugged back in. This moves icons and windows. If one of the sources is a multi-monitor configuration, all windows and icons are moved to the remaining monitor that is not part of KVM. And the worst thing is that the switching time is very long because the computer has to readjust the monitor every time it switches.
CKL Quad Monitor HDMI KVM Switch 4 Port 4K@30Hz with Cables - Extended and Mirrored Display Support for Windows, Linux, and Mac
11 Review
TESmart 1080P 60Hz USB VGA KVM Extender Over Cat5e Cat6 Ethernet Cable - Long Range 984ft/300m (Sender+Receiver)
10 Review
NEWCARE HDMI KVM Switch: 4K@60Hz, 2x1 HDMI2.0 Ports + 3X USB KVM Ports - Share 2 Computers on UHD Monitor, with Wireless Keyboard and Mouse Support - USB Disk, Printer, USB Camera Compatible
10 Review
Enhance Productivity with CKL HDMI KVM 2 Port 4K 30Hz Dual Monitor Extended Display (CKL-922HUA)
10 Review
MasterBox Q300L Micro-ATX Tower with Magnetic Dust Filter, Acrylic Side Panel, Adjustable I/O & Ventilated Airflow, in Black
40 Review
Computer case AeroCool Cylon black
39 Review
Fractal Design Define R5 - ATX Mid Tower Computer Case - High Airflow and Silent Optimized - Includes 2x Dynamix GP-14 140mm Silent Fans - Water-Cooling Ready - Black
43 Review
Zalman Z3 M ATX π» Tower Computer: A Compact and Powerful Machine
77 Review