Re: Beryl White Screen Issue
Had same problem (give up on beryl for now too unstable) but you can start beryl-settings first and try disabling some option. I manage to get it started this way.
First remove .beryl* folder to reset it, then I disabled v-sync (or f-sync) forgot name, disabled detect refresh rate, I disable all plugins I would not need.
Also opengl accel need to be set on nVidia of course (on Gentoo: eselect opengl set nvidia). After an xorg-server upgrade, it was reset but did not show on eselect as being on wrong one, but was.