Linux: Xbox one controller, L and R don't work in games

[devinprater]

What happens?

When playing a PSP game, not sure about the PPSSPP UI itself, the L and R buttons do not work. I used the justest program, found that L and R are 4 and 5, and that seems to have been mapped correctly in the key mapping file that I just looked at but can't remember its name. I'm not sure if this is just a Linux issues or an SLD/QT one, but I've looked through all other related issues I could find, all others have the problem of no buttons mapped or incorrect mappings. I've also had this problem in macOS, but I rarely play PSP games on that because no OCR, although it may be good for others to use for network playing between the laptop, phone, and Mac if that ever happens in my presence.

The Mac problem I can chalk up to SDL, since I know that's what PPSSPP uses there, but I think the Linux version I'm using, PPSSPP 1.7.0 on Fedora 29 with latest updates, uses QT.

What should happen?

The L and R buttons should work. Additionally, the L2 and R2 bumpers should be usable, as they are in Windows, to fast-forward the emulator with R, and open the PPSSPP HUD, with L.

What hardware, operating system, and PPSSPP version? On desktop, GPU matters for graphical issues.

Acer Espire E1574 running Fedora Gnu/Linux 29, PPSSPP 1.7.0 (latest in repository.)

[devinprater]

Update: This happens on Ubuntu as well, using this ppa: https://launchpad.net/~ppsspp/+archive/ubuntu/stable

[devinprater]

Maybe this will help: I ran PPSSPP from terminal, and fowrarded output from the terminal to a file. Some of the inputs seem a bit weird, and a few PSP controls seems to be mapped to multiple Xbox one controls, maybe that's what's wrong?
output.txt

[unknownbrackets]

This is probably related to gamecontrollerdb.txt.

-[Unknown]