@mitu When I did use 20.04, there was an issue with the nvidia 390 driver installing. I thought rolling it back would somehow be better for compatibility. I do have dolphin installed with retropie on my laptop, so I believe I will just use clonezilla to clone it to the nvidia build, and sort through the driver issue then. If that doesnt work I will switch away from Lubuntu and try another distro.

@ashpool yes, I have installed Python 2, all is ok. Thx!

Right, I've heard that Linux people can bypass the Emudriver.

But still - did you try Retroarch standalone? The latest one supports 15khz natively on Linux as well.
On RaspberryPi you need to change hdmi_timings in boot/config.txt to output to a CRT - not sure, perhaps directly from Linux on a PC it's different.

@livefastcyyoung Ok, 300$ is nice. I hope you won't have too many issues though (300$ for a recent device which is still sold around 700$ is kinda fishy)