@sfriedrich the ps4 controller is supported. You can either use a micro usb cable or sync it up via Bluetooth. To do that, you have to put the controller into sync mode by holding the share and PS buttons down until the light on top starts flashing. Go to the retropie menu and then Bluetooth, and sync it up. It will come up as “wireless controller”, then just configure it as you would any controller in emulation station.
And no you don’t have to use a systems original controller. you can use any controller usb or Bluetooth , including ps3. Retropie makes a mapping for each emulator to use your controller that you are using. You just have to configure it in emulation station.

@rac

Ok, after some more digging around in the menu, it’s just a simple error in the documentation.

The correct path is: Quick Menu > Options > Pad # Type

Is this a genuine DS4 (Sony) or a clone ? I have the same controller and it works without issues (wired or bluetooth).

@blerkotron i have got the same issue with the analog sticks using a Sixaxis Controller.
Also works fine with jessie.

Something seems to affect the analog Inputs of Sony Controller when using stretch.

@pjft
My power settings are the stock settings.
I think this is what happens: When the boxart image size is large, the Pi needs a bit of time to load the image. This causes a slight delay when scrolling from one game to the next. Other controllers ignore this, but the DS4 seems to remember the directional button input during the delay and keeps it going, without me having to press the button anymore.
But yes I am very glad I found the solution. Thanks for your input, as you asking me if specific games were causing this, got me on the right track.

@meleu said in Emulators Designating My Primary Controller As 2nd Player:

@Jiryn said in Emulators Designating My Primary Controller As 2nd Player:

How do I install a joystick selection?

https://github.com/meleu/RetroPie-joystick-selection/

It's not part of RetroPie-Setup (yet?).

We discuss about joystick-selection tool in this thread: https://retropie.org.uk/forum/topic/1167/here-is-a-way-to-select-joystick-for-players-1-4-global-or-emu-specific

Thank you so much!!