Two 8BitDo SN30 pro controllers using bluetooth

[MastaG]

Hi there,

I have two SN30 pro controllers connected to my Pi4 using bluetooth but they're giving me some issues.
If I connect them using X-Input (start + X) mode, the triggers don't registeren.
This is a known problem, but I worked around this, by adding them to the configuration manually.
The only problem which remains is the fact that RetroArch always takes up 30 seconds to start now :(

So I removed the controllers and re-paired them in Switch mode (start + Y).
They now show up as Pro Controllers and I have no such issues mapping the triggers.
However now the rumble/vibration function doesn't work.

Is there any bluetooth mode which supports rumble/vibration but doesn't add the annoying delay when starting RetroArch??

[ClassicGMR]

@mastag May or may not help but check that the controllers are on the current firmware. Mine were old and I was having a lot of connection trouble. Can't hurt to verify. :)

https://support.8bitdo.com/firmware-updater.html

[MastaG]

They were on the latest update.
I already figured it out for myself.
I've uninstalled the xpad and xpadneo drivers from the RetroPie setup utility.
Then I installed the latest neoxpad driver from github, with this patch applied: https://patch-diff.githubusercontent.com/raw/atar-axis/xpadneo/pull/283.patch
Finally I edited the /etc/modprobe.d/99-neoxpad-bluetooth.conf file, comment out the disable ertm thing and make sure to load it with xpad emulation enabled:
# options bluetooth disable_ertm=y
options hid_neoxpad xpad_emulation=1

Reboot and pair both controllers in xpad mode.

Setup both controllers in emulationstation and skip the non-working left and right triggers.
When done simply close emulationstation and add the triggers manually:
input_r2_axis = "+5"
input_l2_axis = "+2"

Et voila!

Both controllers working in x-input mode, without the shitty startup delay when launching retroarch and working rumble for my psx and dreamcast games.