x11-plugins/compiz-plugins-main
x11-libs/compiz-bcop
x11-wm/compiz-fusion
x11-plugins/compiz-plugins-extra
x11-libs/libcompizconfig
x11-wm/compiz
dev-python/compizconfig-python
x11-libs/compizconfig-backend-gconf
x11-wm/emerald
x11-themes/emerald-themes
x11-apps/fusion-icon
x11-misc/ccsm
x11-wm/compiz-fusion emerald
emerge --ask x11-libs/compizconfig-backend-gconf
emerge --ask compiz-fusion fusion-icon ccsm simple-ccsm
Obs.: Se pedir para atualizar o /etc rode o comando abaixo e depois repita o item 4
etc-update --automode -5
Se os controles de janela (minimizar, maximizar e fechar) não aparecerem, abra as configurações do fusion-icon e habilite o Decorador de Janelas que resolverá!
http://wiki.compiz.org/CompizFusionIcon
http://wiki.mate-desktop.org/compiz
https://wiki.gentoo.org/wiki/Compiz