FreeBSD brightness controls on Panasonic laptops


I have a longer post about my “new” Japanese Panasonic CF-SZ6 laptop pending. But in the meantime, you can enable Yamamoto Taku’s acpi_video(4) driver to get backlight controls on your function keys:

sysrc kld_list="i915kms acpi_video"

Older Japanese Panasonic laptops used Ogawa Takaya’s and Takahashi Yoshihiro’s acpi_panasonic(4), which I assumed was required but broken on these newer machines. I’d written my own devd wrapper scripts around intel_backlight, before realising they implement generic ACPI drivers. Whoops!

FreeBSD manpage(4) for acpi_panasonic
FreeBSD manpage(4) for acpi_video

Author bio and support


Ruben Schade is a technical writer and infrastructure architect in Sydney, Australia who refers to himself in the third person. Hi!

The site is powered by Hugo, FreeBSD, and OpenZFS on OrionVM, everyone’s favourite bespoke cloud infrastructure provider.

If you found this post helpful or entertaining, you can shout me a coffee or send a comment. Thanks ☺️.