Video

Video is set up by setting global variables in make.conf & portage takes care of the rest.

Determine Hardware

first determine which video card you have and which driver it requires.

root # lspci -k

Intel

gen 1&2:

   /etc/portage/make.conf - set video global variable

VIDEO_CARDS="intel"

gen 3

   /etc/portage/make.conf - set video global variable

VIDEO_CARDS="intel i915"

gen 4+

   /etc/portage/make.conf - set video global variable

VIDEO_CARDS="intel i965"

Ati

Open source drivers:

   /etc/portage/make.conf - set video global variable

VIDEO_CARDS="radeon"

Closed source drivers:

   /etc/portage/make.conf - set video global variable

VIDEO_CARDS="fglrx"

Hybrid

Hybrid intel/ati:

   /etc/portage/make.conf - set video global variable

VIDEO_CARDS="fglrx intel"

root # aticonfig --initial --input=/etc/X11/xorg.conf

Nvidia

Open source drivers:

   /etc/portage/make.conf - set video global variable

VIDEO_CARDS="nouveau"

Closed source drivers:

   /etc/portage/make.conf - set video global variable

VIDEO_CARDS="nvidia"

Other

These settings are used by Parallels VM's and presumably others

   /etc/portage/make.conf - set video global variable

VIDEO_CARDS="vesa vga"

Install

once your video cards variable is set in make.conf merge changes into your system

root # emerge -avuND world

Select Driver

   Note

change the number of card eselected to match the card of your system

root # eselect opengl list
root # eselect opengl set 1

   Note

some setups can make use of opencl

root #eselect opencl list
root #eselect opencl set 1