xxxfb_open(9)

📦 version 7.3.1, in nixpkgs unstable

💅 xxxfb_open — like, the kernel API manual page, bestie ✨

okay so this is xxxfb_open(9) from the Kernel API Manual and it's genuinely one of the chillest pages you'll ever read. no cap. it's short, it's sweet, and it's giving "optional side quest" energy. let's get into it 🎀

🌸 NAME 🌸

xxxfb_open — the optional function, called when the framebuffer is first accessed. yes bestie, optional is doing a lot of heavy lifting in that sentence, remember that 💅

✨ SYNOPSIS ✨

int xxxfb_open (struct fb_info *info , int user );

that's it. that's the whole signature. iconic honestly 🫶

🦋 ARGUMENTS 🦋

  • info — the frame buffer structure that represents a single frame buffer. one struct, one framebuffer, main character energy fr fr 👑
  • user — literally just tells us if the userland is the one accessing the framebuffer (value = 1) or if it's the console doing it. so like, 1 means "hi it's me, userspace" and anything else means "console here" 🙈

💖 DESCRIPTION 💖

so this function? it's the first function called in the framebuffer api. first! like the opening act at a concert 🎤

Usually you don't need to provide this function. (see? told you. optional. slay.) the one case where it actually gets used is when you need to change from a text mode hardware state to a graphics mode state — that's the glow-up moment ✨🦋

and the return situation: negative errno on error, or zero on success. that's it. that's the whole vibe check 🔥

ngl bestie, if you're out here implementing xxxfb_open for no reason, ask yourself why 😭 most of the time you simply don't have to.

🌈 SEE ALSO 🌈

the kernel file ./drivers/video/fbdev/skeletonfb.c — go read it, it's literally the blueprint 🧚 and then the whole friend group:

and yes, xxxfb_suspend(9) and xxxfb_resume(9) are listed twice — they really said "and also these two, again" 💀 not me pointing it out, it's just in the source okay 🙈

💜 okay that's the page!! huge shoutout to ./drivers/video/fbdev for being the source, and this one's dated October 2026, filed under xxxfb_open(9) in the Kernel API Manual. mwah, go write your framebuffer driver bestie, you got this 💅✨🎀🍓

📦 where this page comes from