xxxfb_release(9)

📦 version 7.3.1, in nixpkgs unstable

🎀 xxxfb_release(9) 🎀

okay so bestie, pull up a chair, because we're reading a Kernel API Manual page together and honestly? it's a short one, so no stress 💖 this is xxxfb_release and it's about to be your new fave little optional callback, no cap.

✨ NAME ✨

xxxfb_release — the Optional function. Called when the framebuffer device is closed. yeah you heard me, optional, so don't come for her if she's not in your driver 💅

✨ SYNOPSIS ✨

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

look at that signature. gorgeous. iconic. copy it exactly, she's sensitive 😭

✨ ARGUMENTS ✨

  • info — the frame buffer structure that represents a single frame buffer 🖼️ like, a frame buffer, one of them, singular, bestie.
  • user — literally telling us who's knocking on the door: if the value is 1 it's userland, and if it's not, it's the console accessing the framebuffer 🫶

✨ DESCRIPTION ✨

so this function gets called when we close /dev/fb or when the framebuffer console system is released 🌸

ngl, usually you don't need this function. like, at all. it's giving "invited but not required" 🙈

but the case where it does usually get used? going from a graphics state to a text mode state ✨ that's her moment. main character energy fr fr.

and bestie, the return vibes: negative errno on error, or zero on success ⭐ that's it, that's the whole mood.

✨ SEE ALSO ✨

the whole squad, plus the kernel file ./drivers/video/fbdev/skeletonfb.c 👑

(yes, xxxfb_suspend(9) and xxxfb_resume(9) are in there twice. we don't gatekeep, we don't question, we just list them exactly like the original did 💀 love that for them.)

lowkey reminder: she's optional, so if your driver doesn't have her, that's valid and the kernel will cope 💜

and that's the whole page, bestie!! 🦋 signed off from ./drivers/video/fbdev, dated October 2026 🎀 catch you in the next manpage, mwah 💅✨

📦 where this page comes from