@dankcushions Thanks for that, clears it up a little bit.

@mitu Yeah, unfortunately even though they are physically different PCBs, they detect as the same type (Generic Dragonrise USB Controller)

@nielogiczny Makes sense! I had to do that with the 8-bitdo SNES Bluetooth controller. The setup script had it as an option. Before that, only one or 2 of the key presses would do anything, and it registered as a keyboard when it did.

Glad you got it working!

In Raspi-Config, Select Advanced, Overscan and then Disable. That should allow your GUI to extend to the edges of your screen. if it's still not to your liking you'll need to change the Overscan value in Config.txt in the /boot partition on your MicroSD card.

@TheBlueBanner said in USB HUB not detecting Joysticks:

https://thepihut.com/products/4-port-usb-hub-usb-2-0.

So, I received this USB hub. It worked! The only issue I have is that there doesn't seem to be enough power going to the LED lights, and they are dimmer than what I would like. I am not sure if there is anything I can do, but it worked none the less.

Well after some trouble shooting the silly chinease guy who made the hub had swapped the data lines over, so the colours were not inline with the standard.

all working hunky dorey now.

Good luck with the project, but you can fit everything in the case without removing ports from the Pi. I even (almost) fit a USB drive inside.

I mean, if you want to, you can, but it's not required for it to fit.

@Smilator
The hard drive needs to be powered either by plugging into the wall or using a powered USB hub. There is a PiDrive hard drive that is low powered that might work. I believe it shares the power adapter with the Raspberry Pi. I also see they have an enclosure for the both the hard drive and the Pi in one case.

Another option instead of a hard drive would be to use a large USB flash drive:
https://github.com/RetroPie/RetroPie-Setup/wiki/Running-ROMs-from-a-USB-drive

I've never tried it but I've read that powered USB hubs can power the Raspberry Pi but I'm not sure if it will be the correct 5V 2.5A (or whatever the Pi 3 needs).

With the correct power adapter to your Pi, you can run the four PS3 controllers via Bluetooth without any issues.

then i can put in it pretty much complete romsets of games (from the NES to the Dreamcast)

I really haven't had many issues with NES, SNES, Gameboy (Color/Advance), Genesis, Sega CD & 32X, Game Gear, TurboGrafx 16/CD but it has been pretty much hit or miss with Dreamcast games. You might check out the Dreamcast Compatibility List:
https://docs.google.com/spreadsheets/d/1AD91IcudqHP7dDmEXLO25Pzb85uUgAy4chU2QxlZBQk/edit#gid=379183179

The games that don't work, you really don't need to have because they are just wasted space (unless in the future there is an update to the emulator that supports that game).

PSX games are more reliable than Dreamcast but I've had issues with some of them as well. I don't know if the PSX has a "Compatibility List" like the Dreamcast.

P.S. making a wood box to 'store' all the components would be a super bad idea, right?

Yeah. Someone on this forum (maybe @obsidianspider) is making a box with arcade buttons & a joystick on top and all the hardware inside and then you just plug it into the TV. Gives you that arcade feel but the box just sits on a coffee table and you get to use your large HDTV! You could even make the box wider and add a 2nd set of arcade buttons/joystick for player 2. The player 3 and 4 can use Bluetooth PS3 controllers.