On some systems, installing the packages that are required for UEFI booting with any gcc later than a 4.x.x release may lead to a black screen after the GRUB screen. To fix this, before you begin installing any packages on your system, emerge =gcc-4.6.4-r2 and proceed with the installation as usual. Remember to switch your compiler back to the version of gcc that came with your system after you have finished installing. To do this, use gcc-config 2.
И это когда я уже скомпилял всю генту в чруте и ломаю голову, чего это у меня ведро в чёрный экран вываливается после загрузчика? Ненавижу grub2.