After editing Retroarch from ES all emulators stopped working & I cant edit Retroarch now

[chainsaw1968]

Firstly I'm a newbie, so please go easy on me.

My setup is as follows:

Hardware: HP DC7800 PC
Memory: 3.8 GiB
Processor: Intel® Core™2 Duo CPU E8400 @ 3.00GHz × 2
Graphics: Intel® Q35
OS: Ubuntu 20.04.2 LTS - 64-bit
RetroPie Version Used: retropie-setup - bump version to 4.7.17
Built From: on top of existing OS
USB Devices connected: 2 X Logitech F710 controllers
Guide used: https://retropie.org.uk/docs/Debian/

Firstly I had followed all the instructions & had all my emulators, games, ports etc working.

The only exception was N64, which was unplayable, running at 2-3 FPS & constantly hanging. The only emulator that would work was lr-parallel-n64. All other emulators wouldn't even launch the games.

After some research I read that the changing the retroarch video driver to vulcan would help.

I entered the retroarch GUI through ES & edited the video driver & saved on exit.

As soon as I did this all the emulators stopped working.

So I tried to go back in & undo my changes, but now the retroarch GUI wont launch from ES.

I tried manually searching for my retroarch config file but I cant find it?

Any ideas?

[theissdev]

@chainsaw1968 Retroarch config is /opt/retropie/config/all/retroarch.cfg
https://retropie.org.uk/docs/RetroArch/