Thanks for the tip. I just installed it and now it's "autosave completed!". Although the game won't load anyway for some reason :/

@YoshiFan501 no prob. Glad i could help!!

Found the problem!

The PCSX-ReARMed.rmp file in /configs/psx/PCSX-ReARMed folder had only configurations for player 1, so I just duplicated the lines for player1 for player2.

Not sure where the wrong configs come from, but this overrides them.

@OldDucGuy I just run the parent

@markyh444 nice. I have the normal hd boot video on my pi. I will have to add this to it too.

@edmaul69 that's the problem. I did an update and forgot to add the bios, and had the exact same issue with CTR. Just add the bios and you will be racing!

Great news guys its up and running thank you very much for all your help and knowledge now its time for the dreamcast.

@dankcushions Perfect advice, thank you! I've now gone ahead and installed that BIOS

Also, I've found that using eBoot files (.pbp) combine all the discs in to one image file

Had the same problem on my ubuntu mashine.
The BIOS files where named using upper case, but they had to be lower case.

Just rename the BIOS files to lower case.

If any devs interested in investigating, here is the faulty savestate for Gran Tourismo 2 [E]
Savestate was made in the regular in-game menu, where you could go to races or your garage etc
https://mega.nz/#!E5FEiQAY!Zb08vrSqmOuTz83QBG4PHSc_S5GDODMRlC8OwGlw4eY

I've bought this one : http://www.futuremax.eu/nl/impact-soft-dancemat-pc-usb-dansmat-van-positive.html
Tried it using my pi (model 3) and retropie 4.0. ES immediately recognized it and after configuring the button's , it worked like a charm on DDR and DDR Konamix on the psx emulator.

I haven't noticed any delay and the inputs work nicely

Happy Dancin'

Could be that annoying bug that many people faced with the new version. Really what @Floob said; check the following file:

/opt/retropie/configs/psx/retroarch.cfg

If it has a lot of code you need to delete the file, update the RetroPie Install script, re-install the emulator(s). I had a similar problem with the Genesis emulators and this solved it, I hope it works for you like it did for me.

@lilbud i actually have that as the splashscreen of my pi modded playstation 1. The greatest video game system boot video ever.

@klay824 Glad to know that you managed to fix it, albeit in this radical way. I gave up and jumped to Recalbox for the time being, I found it to be more user friendly to someone as useless as I am in Linux.

My version of scph5500.bin has the correct MD5 checksum of 8dd7d5296a650fac7319bce665a6a53c and the CRC32 checksom of ff3eeb8c

I think it might be a filename issue. I'll experiment with added a dash in it like scph-5500.bin

Edit:
I've tried many filename cases but non seam to work when trying to play Japanese games but I did find out that it really doesn't matter what case the BIOS files are to play the US games and also worked with just about every BIOS version (US games playing with any J, E and U BIOS files 10x, 100x, 300x, 350x, 500x, 550x, 700x and 750x). Some US games will even play without a BIOS file but it gives a quick message stating "no BIOS found, expect bugs!"

I'm testing with 2 Japanese games: Captian Commando and Nekketsu Oyako. Maybe neither one of these work with the emulator.

Does anyone out there have any Japanese games working and which one(s) did you get working?