ioctl return -1 when running rust logo example using kdMode::Graphics about rust-framebuffer HOT 4 CLOSED

This library does not work from a graphical user interface (X11/Wayland), you have to make sure to run the code from the linux framebuffer (e.g. ctrl-alt-f1 on Ubuntu).

If you did, then I will have to investigate this further.

from rust-framebuffer.

Thank you for your advice! <3
I didn't run the code from tty before. However, this time I tried to run code from tty, the same error occurs again. Here is the screen shot, which is produced by fbgrab.

Besides, there are some of my basic system information (IDW what to put here XD:

                   -`                    zarkli@myArch 
                  .o+`                   ------------- 
                 `ooo/                   OS: Arch Linux x86_64 
                `+oooo:                  Kernel: 6.4.12-zen1-1-zen 
               `+oooooo:                 Shell: fish 3.6.1 
               -+oooooo+:                Resolution: 3200x2000 
             `/:-:++oooo+:               WM: sway 
            `/++++/+++++++:              Theme: Layan-Dark [GTK2/3] 
           `/++++++++++++++:             Icons: Tela-dracula [GTK2/3] 
          `/+++ooooooooooooo/`           Terminal: kitty 
         ./ooosssso++osssssso+`          CPU: 11th Gen Intel i7-11370H (8) @ 4.800GHz 
        .oossssso-````/ossssss+`         GPU: NVIDIA GeForce MX450 
       -osssssso.      :ssssssso.        GPU: Intel TigerLake-LP GT2 [Iris Xe Graphics] 
      :osssssss/        osssso+++.       Memory: 9926MiB / 15778MiB 

from rust-framebuffer.

I just verified this on my own Archlinux setup, and it seems that it is no longer allowed to access the framebuffer device as root. You can follow the steps in the readme on how to add you to the video group. Once you have added yourself it will work and you no longer have to use sudo to run cargo or your executables 😄.

I will remove the sudo part from the readme.

from rust-framebuffer.

It works! Thanks you <3

from rust-framebuffer.