Razer Command Dial (on Razer BlackWidow v4 Pro) doesn't work in Driver Mode

[therob89]

Distribution

OS: Fedora 39
Kernel: 6.7.10-200.fc39.x86_64
OpenRazer: 3.7.0-1.3

Support

• Have you tried rebooting?
• Have you looked at the Troubleshooting page?

Razer Command Dial on Razer BlackWidow4 Pro doesn't work in driver mode.

A partial workaround to this problem was the proposed by @z3ntu that works until the next boot:

1. Identify the BlackWidow v4 Pro Device

# Identify the Razer BlackWidow v4 Pro Device
find /sys -name device_mode
hexdump /sys/devices/pci0000:00/0000:00:14.0/usb3/3-7/3-7.3/3-7.3.1/3-7.3.1:1.2/0003:1532:028D.0007/device_mode

2. Switch to Device Mode

# Identify the Razer BlackWidow v4 Pro Device
find /sys -name device_mode
hexdump /sys/devices/pci0000:00/0000:00:14.0/usb3/3-7/3-7.3/3-7.3.1/3-7.3.1:1.2/0003:1532:028D.0007/device_mode


# Switch the Device in Device Mode to use Razer Command Dial
echo -n -e "\x00\x00" > /sys/devices/pci0000:00/0000:00:14.0/usb3/3-7/3-7.3/3-7.3.1/3-7.3.1:1.2/0003:1532:028D.0007/device_mode

Below the LoC where the Driver mode is set:

https://github.com/openrazer/openrazer/blob/master/daemon/openrazer_daemon/hardware/keyboards.py#L31

[z3ntu]

Would be interesting if you could add some logging into https://github.com/openrazer/openrazer/blob/master/driver/razerkbd_driver.c#L3230 and/or https://github.com/openrazer/openrazer/blob/master/driver/razerkbd_driver.c#L3578 to see what kind of data the device sends us. Then we can try and handle this to work as expected also in driver mode. If you need any more specific advice let me know.

See also https://github.com/openrazer/openrazer/blob/master/DEVELOPMENT.md