drm + kms + egl

[Alberich de megres]

Hi!!

I was trying to understand how the drm mode setting + egl works. I
checked the wayland sources, and i tried to make a reduced subset
(copy pasting some parts of the wayland code) to get a white just
screen (glClear with white background).

But I'm getting some weird stuff, like lots of black and white
vertical columns. So obiously i'm missing something.
Is there some place to read about or with some detailed info?

Also i can attach the code, it is little one.

thanks!
Albert