I installed Emulation Station, but messages about missing systems (while retroarch sees eg snes9x core).
Somehow I managed to be able to use a single ps3 controller (via bluetooth) within Retroarch. I applied user 1 bind all to set the buttons of controller1. However when I start the controller2 then the controller1 starts acting strange in the menu. E.g 'Down' acts same way as pagedown (all to the end of menu). When I disable controller2 behaviour is back to regular.
Controllers seem to interfere each other?
Fix: I have fixed the problem by turning off controller2, go to user bind 2 all (with controller1). When system asks for key input, quickly turned on controller2 and keyed in all the buttons. Now everything works fine.