Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
NVIDIA Corporation GF108M [GeForce GT 540M] [10de:0df4] (rev a1) (prog-if 00 [VGA controller])
Linux *** 4.0.6-1-ARCH #1 SMP PREEMPT Tue Jun 23 14:25:08 CEST 2015 x86_64 GNU/Linux
mesa 10.6.0-1,
nvidia 352.21-1,
xf86-video-intel 1:2.99.917+364+gb24e758-1,
3.2.1-10,
primus 20150118-2
By the way i run UE4 by using primus