If I use optirun to run playonlinux ( or PRIMUS_SYNC=2 primusrun playonlinux ) and then I choose a game that uses wine, does my game also use secondary graphic card ? I ask because I get low FPS as if I was using integrated graphic card. After launching the game I get following warning in Terminal: primus: warning: recreating incompatible pbuffer, can it cause any fps problems ? I have installed graphic driver and followed this tutorial HOW TO PLAY LEAGUE OF LEGENDS ON UBUNTU 14.04 to install League of Legends but I still get much worse performance than on Windows7 (around 30 fps on Ubuntu, 60 fps on Windows) ?
You might have to specify the windows application directly when calling primusrun. You could try something like:
primusrun wine "C:\path\to\your\windows\application.exe"