Shanwan PC/PS3 controller not being detected(Linux).

[Akami]

Hello, I'm currently using Linux Mint 20.3, built PPSSPP from the source at github, and I'm having trouble setting some of the keys on PPSSPP.
The DPad(Axes 4 and 5) and the horizontal right analog(axis 2, note that only negative values are not ready by PPSSPP, the positive values are read, which are set when you push the analog to the right).
   

The controller is fine since it works perfectly on Android PPSSPP version(connected via bluetooth), and on linux's RetroArch(connecting to PC via USB cable) it works fine too.

TL DR the DPad doesn't work and the left side of the right analog stick doesn't also, I have tried using xboxdrv and didn't work either.

Also tested on the newest Manjaro, on that other keys stopped working(the Y(triangle) button as an example) but others such some of the DPad went back to working.

[Ak420]

I also facing same problem on my android