Nvidia drivers (gentoo)

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emerge media-video/nvidia-kernel
emerge media-video/nvidia-glx
modprobe nvidia

Yes u should have configured u re /etc/X11/xorg.conf correctly ;) -> see gentoo documents: http://www.gentoo.org/doc/de/nvidia-guide.xml

If there are problems with the nvidia devices:

for i in 0 1 2 3 4 5 6 7; do
node="/dev/nvidia$i"
rm -f $node
mknod $node c 195 $i || echo "mknod \"$node\""
chmod 0660 $node || echo "chmod \"$node\""
chown :video $node || echo "chown \"$node\""
done

node="/dev/nvidiactl"
rm -f $node
mknod $node c 195 255 || echo "mknod \"$node\""
chmod 0666 $node || echo "chmod \"$node\""
chown :video $node || echo "chown \"$node\""