KVM Model:
1.4 Display Port KVM Switch - Dual Monitor - Two Computer
USB Interface (5-gigabit or 10-gigbit):
10-gigabit
Problem:
- Issue on M1 MacBook Pro:
- The HID ports do not work at all.
- USB hubs (tested on both HID and USB3 ports) connected via the KVM fail to function.
- Comparison with 2019 MacBook Pro:
- On the 2019 model, everything works fine.
- Devices such as the Logitech mouse and NovelKeys keyboard operate flawlessly when connected to either USB3 or HID ports on both my PC and laptop—even when using several different USB hubs through the KVM.
Other Notes:
- USB Hubs Tried:
- An older Anker powered USB hub
- A brand new Sabrent powered USB hub
- A generic Amazon Basics unpowered USB hub
- None of these work on the M1 laptops when connected via the KVM, regardless of using HID or USB3 ports.
- Direct Connection:
- When connected directly to the CalDigit TS4 dock, the peripherals work fine on the M1 laptops—but this configuration prevents the PC from receiving audio.
- Firmware Check:
- The TS4 dock has been tested with both its original 2022 firmware and the latest version available, with no improvement in HID/hub support.
- Signal Chain:
- Laptop: USB-C → CalDigit TS4 → KVM → Samsung Monitor + Dell Monitor
- PC: USB-C → KVM → Samsung Monitor + Dell Monitor