linux-kernel-module-cheat/x11.md

X11

Only tested successfully in x86_64.

Build:

./build -x
./run

We don't build X11 by default because it takes a considerable amount of time (~20%), and is not expected to be used by most users: you need to pass the -x flag to enable it.

Inside QEMU:

startx

More details: https://unix.stackexchange.com/questions/70931/how-to-install-x11-on-my-own-linux-buildroot-system/306116#306116

Not sure how well that graphics stack represents real systems, but if it does it would be a good way to understand how it works.

X11 ARM

On ARM, startx hangs at a message:

vgaarb: this pci device is not a vga device

and nothing shows on the screen, and:

grep EE /var/log/Xorg.0.log

says:

(EE) Failed to load module "modesetting" (module does not exist, 0)

A friend told me this but I haven't tried it yet:

• xf86-video-modesetting is likely the missing ingredient, but it does not seem possible to activate it from Buildroot currently without patching things.
• xf86-video-fbdev should work as well, but we need to make sure fbdev is enabled, and maybe add some line to the Xorg.conf