Obscure Issue Involving a KB and KVM


hsehestedt

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Texas, USA
OS
Win11 Pro 23H2
I use a KVM to switch between computers. The KVM allows for a single keyboard and mouse to control up to 4 computers. This KVM has 4 inputs:

1) USB Keyboard connection
2) USB Mouse connection
3) Generic USB connection
4) Another generic USB connection

When selecting a computer, all 4 of those inputs get connected to the selected computer.

The keyboard connector seems to be different from the generic USB inputs in one respect: It intercepts the keystrokes from the keyboard and looks for the sequence CTRL + CTRL + 1/2/3 or 4. Likewise it also looks for ScollLock + ScrollLock + 1/2/3 or 4. For either of those keyboard sequences, it causes the KVM to switch to the selected system. For example, if I press CTRL + CTRL + 2, the KVM will switch to computer #2. This has always worked fine, however, I finally just replaced my ten year old mechanical keyboard with a new one and I cannot get the keyboard to work on that keyboard port of the KVM. This keyboard is one of those that supports a very high polling rate of up to 8,000 Hz whereas a standard keyboard is only 125 Hz. I initially thought that this might be the problem, but my new keyboard allows me to change the polling rate, so I dropped it down to the standard 125 Hz and that still did not work.

I have found that if I connect the keyboard to one of the generic USB ports, then the keyboard works just fine, however I lose the ability to switch to another computer using the hotkey sequence on the keyboard.

My KVM does have a physical button on it that I can use to switch between computers, but the KVM is out of reach from where I sit. I could relocate the KVM to my desk, but that would require that I purchase longer USB and HDMI cables to reach each of my computers.

Is this an issue for which anyone knows of any sort of corrective action or setting?

The keyboard in question is a Corsair K70 Max RGB Magnetic-Mechanical keyboard.
The switch is an AIMOS AM-KVM401.
 

My Computers

System One System Two

  • OS
    Win11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    1Gb Up / 1 Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Win11 Pro 23H2
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Mouse
    Buttonless Glass Precision Touchpad
    Keyboard
    Backlit, spill resistant keyboard
    Internet Speed
    1Gb Up / 1Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
I use a 4-port TrendNet KVM and it has a 'feature' of pressing the NumLock twice steps between the running Desktops. Win11, Win10, Win7 and Linux Mint
It skips the Win7 as it usually is Off, only keep it for very old programs and reference.
 

My Computers

System One System Two

  • OS
    Win11 Pro RTM
    Computer type
    Laptop
    Manufacturer/Model
    Dell Vostro 3400
    CPU
    Intel Core i5 11th Gen. 2.40GHz
    Memory
    12GB
    Hard Drives
    256GB SSD NVMe
  • Operating System
    Windows 11 Pro RTM x64
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Vostro 5890
    CPU
    Intel Core i5 10th Gen. 2.90GHz
    Memory
    16GB
    Graphics card(s)
    Onboard, no VGA, using a DisplayPort-to-VGA adapter
    Monitor(s) Displays
    24" Dell
    Hard Drives
    512GB SSD NVMe, 2TB WDC HDD
    Browser
    Firefox, Edge
    Antivirus
    Windows Defender/Microsoft Security
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