14.4. X11 Buildroot
Once you’ve seen the CONFIG_LOGO penguin as a sanity check, you can try to go for a cooler X11 Buildroot setup.
Build and run:
./build-buildroot --config-fragment buildroot_config/x11 ./run --graphic
Inside QEMU:
startx
And then from the GUI you can start exciting graphical programs such as:
xcalc xeyes
We don’t build X11 by default because it takes a considerable amount of time (about 20%), and is not expected to be used by most users: you need to pass the -x flag to enable it.
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.
To x11 packages have an xserver prefix as in:
./build-buildroot --config-fragment buildroot_config/x11 -- xserver_xorg-server-reconfigure
the easiest way to find them out is to just list "$(./getvar buildroot_build_build_dir)/x*.
TODO as of: c2696c978d6ca88e8b8599c92b1beeda80eb62b2 I noticed that startx leads to a BUG_ON:
[ 2.809104] WARNING: CPU: 0 PID: 51 at drivers/gpu/drm/ttm/ttm_bo_vm.c:304 ttm_bo_vm_open+0x37/0x40