Enabling nvidia_drv.modeset disables my acpi_video0 backlight control

I need to set the backlight of my laptop using the acpi_video0 interface (intel_backlight won’t work). When I enable nvidia_drv.modeset the /sys/class/backlight/acpi_video0/ folder is never created.

I have the 387.34 drivers. I was skimming through the changelogs and I read about the nvidia.NVreg_EnableBacklightHandler=1 parameter, but setting it makes my computer freeze during startup, and I don’t think it’s what I need anyway.

This handler overrides the ACPI-based one provided by the video.ko kernel module.

What I need is actually the opposite…