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I have an old Belkin USB 2.0 switch from god-knows when that works beautifully. I use it to share a hub with a keyboard and mouse attached. I’ve given up trying to find a 4K60 x2 DisplayPort KVM that doesn’t suck.

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I have this one[0] that works great.

Wendell at Level1Techs does good work and there's even newer ones that can do 8k30.

[0] https://store.level1techs.com/products/kvm-switch-dual-monit...

I couldn't find the details on their site, but do you know whether the 3.5mm audio jack is 3 or 4 pole? I've found that most KVMs have the 3 pole jack, meaning it just supports audio out, but I need 4-pole so my headset microphone works.

You can get USB audio dongles that have that. Which could then switch on the KVM instead.

I have been using this at 4k60 (but 1 monitor) flawlessly for 8 months.

https://www.startech.com/Server-Management/KVM-Switches/2-po...

Seconding a recommendation for Startech's KVMs. They have an excellent USB stack which handles complex USB hierarchies flawlessly -- I've successfully used mine with chained hubs, weird HID devices like Apple keyboards, and non-HID devices like disks, audio interfaces, and even stranger things.

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