ref: Bumblebee
zypper ar -f http://download.opensuse.org/repositories/X11:/Bumblebee/openSUSE_42.1/X11:Bumblebee.repo
zypper in bumblebee
usermod -G video,bumblebee tom
systemctl enable bumblebee
Check /etc/modprobe.d/50-blacklist.conf for line blacklist nouveau. If not add it.
mkinitrd
Install nvidia driver if want to use its graphic card for games etc.
zypper in linux-glibc-devel
zypper in -t pattern devel_kernel
Follow this Install link
zypper in nvidia-bumblebee
zypper in nvidia-bumblebee-32bit
systemctl enable dkms
mkinitrd
reboot
Test function
optirun --status
optirun glxspheres
primusrun glxspheres
glxspheres
Steam Games
add advanced launch command: primusrun %command%