HCONS(4)

📦
version 15.1 · 2 versions
, in freebsd 15.1, nixpkgs unstable

💅 HCONS(4) — the HID consumer page controls driver, bestie edition 🎀

okay so real talk, this is hcons(4) from the Kernel Interfaces Manual, and it's lowkey iconic once you get what it does. sit down, grab a strawberry drink 🍓, and let's get into it.

✨ NAME ✨

hcons — the HID consumer page controls driver. yes that's the whole name, she's concise, she's giving main character energy 👑

🌸 SYNOPSIS 🌸

so like, if you wanna compile this driver into the kernel (the commitment era), you drop these lines into your kernel configuration file:

device hcons
device hid
device hidbus
device hidmap
device evdev

or — and this is the chill option — you can load the driver as a module at boot time (the low-commitment era 🦋) by putting this single line into loader.conf(5):

hcons_load="YES"

no cap, that's it. that's the whole vibe check. ✨

💖 DESCRIPTION 💖

the hcons driver provides support for HID consumer page controls, which are most often the ones used as "Multimedia keys" found on many keyboards. yk, the play/pause/volume situation? she handles all of that. 🎵

and here's the cute part — the /dev/input/event* device presents the consumer page controls as a evdev type device. so everything just shows up where you'd expect it. obsessed.

🧚 SYSCTL VARIABLES 🧚

the following variable is available as both a sysctl(8) variable and a loader(8) tunable, which is honestly so versatile of her 💅:

  • dev.hcons.X.debug — the debug output level, where 0 is debugging disabled and larger values increase debug message verbosity. Default is 0.

and her default value is set with the loader(8) tunable:

hw.hid.hcons.debug
fr fr, if stuff's acting weird, this is your girl. just... maybe don't crank it for no reason 🙈

🎀 FILES 🎀

  • /dev/input/event* — the input event device node. she's right there. living her life. 🦋

⭐ SEE ALSO ⭐

go read those too, iykyk 😌

🌈 HISTORY 🌈

the hcons driver first appeared in FreeBSD 13.0. a legend was born 👑

💜 AUTHORS 💜

the hcons driver was written by Vladimir Kondratyev <wulf@FreeBSD.org>. thank you for your service king 🫶

and that's the whole page, bestie! this particular edition is dated January 23, 2021 and comes to you from Debian, so go forth and enjoy your multimedia keys — they're literally working because of this. periodt. 💅✨🎀

📦 where this page comes from