Nothing happens on Arch Linux

Hi, I am able to control my monitor's brightness with i2c_dev module and ddccontrol but this driver does not work. It does not create /dev/bus/ddcci nor anything in /sys/class/backlight. It does create /sys/bus/ddcci as expected. I'm unsure how to debug since there is apparently nothing logged.

Here is proof the module loads:

$ lsmod | head
Module                  Size  Used by
ddcci_backlight        16384  0
ddcci                  24576  1 ddcci_backlight
i2c_dev                16384  0

$ tree /sys/bus/ddcci/
/sys/bus/ddcci/
├── devices
├── drivers
│   └── ddcci-monitor
│       ├── bind
│       ├── module -> ../../../../module/ddcci_backlight
│       ├── uevent
│       └── unbind
├── drivers_autoprobe
├── drivers_probe
└── uevent

4 directories, 6 files