Translations:/etc/portage/make.conf/70/it
From Gentoo Wiki
Portage uses the USE_EXPAND variable called VIDEO_CARDS to enable support for various graphics cards in packages. Setting VIDEO_CARDS to appropriate value(s) will pull in the correct driver(s):
FILE
/etc/portage/make.confSet VIDEO_CARDS to intel nvidia radeon vesaVIDEO_CARDS="intel nvidia radeon vesa"
Substitute the name of the driver(s) to be used. Common choices include nouveau, nvidia, radeon, and intel.
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After setting or altering VIDEO_CARDS values remember to update the system using the following command so the changes take effect:
root #emerge --ask --changed-use --deep @world