@2e9f5e44 my main advice is: if the price is "cheap" you're going to pay for it in frustration. I have a no-name 1:3 switcher with a single push-button that regularly drives me *nuts* when I can't get the monitor to wake properly with Linux. I think the culprit is bad EDID somewhere in the software stack. The single push-button is also slow and I regret not getting something with a button per input set.

I bought a GREATHTEK device for my mother a while ago which I kinda like, but not a duplex device. 

 @cf232284 Thanks for the info!