AVMATRIX-VK12-4K Setup

Summary

Covers experience using AVMATRIX VK12-4k graphics card

Driver

You can get the driver from the manufacturer which ends up being a one driver link, or GE repository also has the driver avaialable.

• https://www.avmatrix.com/download/]
• https://github.com/GloriousEggroll/AVMATRIX-VC41-VC42-CAPTURE
• ./dkms-install.sh was used for installation

Secure Boot

You may get a “Modprobe” install failure if using secure boot since the key is not trusted, in this case you will need to make your own key, and sighn the module.

modprobe: ERROR: could not insert 'HwsUHDX1Capture': Key was rejected by service
ERROR: Load driver module failed!

Generate Key

openssl req -x509 -newkey rsa:4096 -keyout MOK.priv -out MOK.pem -sha256 -nodes -days 36500 -subj "/CN=Module Signing Key/"
openssl x509 -in MOK.pem -inform PEM -out MOK.der -outform DER

Import Key, and Reboot

sudo mokutil --import ./MOK.der
sudo reboot

• when you reboot enter MOK Management by following the blue screen prompt
• select enroll key
• view key 0
• enter password from mokutil --import

Sign the kernal Module

Create the below script with proper paths.

# Define key and module paths for clarity
KEY_PRIV="/home/AVMATRIX-VC12-4K-CAPTURE/MOK.priv"
KEY_PUB="/home/AVMATRIX-VC12-4K-CAPTURE/MOK.der"
MODULE_NAME="HwsUHDX1Capture"

# Get path of module
MODULE_PATH=$(modinfo -n $MODULE_NAME)

# Module signing script location fedora
SIGN_SCRIPT="/usr/src/kernels/$(uname -r)/scripts/sign-file"

# Execute the signing command
sudo "$SIGN_SCRIPT" sha256 "$KEY_PRIV" "$KEY_PUB" "$MODULE_PATH"

# Add the module
sudo modprobe $MODULE_NAME