I am running this on a brand new laptop on Ubuntu with UEFI and Optimus technology (Acer Aspire V5 571G), using Bumblebee to switch cards.
I have found that with Bumblebee, I have to switch cards in terminal using
Code:
$cd Regnum/
$optirun bash
$./rolauncher
The game runs quite well, the card is an Nvidia GeForce 620M 1GB, and I can get about 40FPS with graphics set to "high".