I am reaching out and hoping that I can get some help on a setup for a multi-use computer lab. I have a special lab that is used for Cisco CCNA classes. I have Dell 9020's running an i7 process and Windows 7 pro. These are our daily use machines that have general lab software like PacketTracer, MS Office, the network printer, Internet access, etc. I also have another round of similiar pc's on the floor that we use for our Linux classes, OS classes, and hardware classes to install os's on and then each person in the class has their own computer to use in a classroom environment to do labs etc. We now are using Raspberry Pi's in Linux classes, as well as Python classes and to do out reach with local schools. They typically interface Arduinos with either the Windows pc's or the Pi's if they are more advanced. I really want to be able to use a KVM switch to be able to switch between all the different pc's and the Pi's, but have not had much luck. We are using VGA KVM 4-port switches with a VGA to HDMI splitter. The biggest issue is that I can switch between devices, but then either video won't display properly with the Pi or the keyboard and mouse won't be recognized with the pc's. We also want the ability for our students (school groups who own their own) with their own Pi's to be able to come into the lab and use the keyboards, mice and monitors. Does anyone have any experience with this? Any advice would be really appreciative. Would like feedback before I spend a ton of money moving to another room with more hardware or replacing my KVM switches.