On Fri, 19 Sep 2014, O. Hartmann wrote:

nVidia's BLOB from port x11/nvidia-driver seems to have problems in FreeBSD 
#2 r271869: Fri Sep 19 13:28:03 CEST 2014 amd64, on Lenovo ThinkPad Edge E540 
laptop with
CPU i5-4200M (Haswell) with integrated HD4600 Intel iGPU and dedicated nVidia 
GT 740M
(Optimus) working correctly.

Optimus is supposed to be full Intel graphics plus an Nvidia GPU. The extra GPU uses the same display memory and can be enabled to speed up the Intel graphics or disabled for power saving. I don't know if versions where the Nvidia section is a full discrete video adapter that can be used alone are still called "Optimus".

Some Optimus owners have reported being able to use the Intel drivers after disabling the Nvidia GPU in the BIOS or UEFI. If an option to disable the Nvidia GPU is not present, some people have reported success with an xorg.conf that uses only the intel driver and ignores the Nvidia hardware.
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