i hope this is the right place for this bug report, the bluez website isn't too clear about that. The new Microsoft Xbox-Controllers don't work properly, but enter a connect/disconnect loop when in pairing mode after being paired. Regular connect (outside pairing mode) doesn't work at all. According to the dev of xpadneo this seems to be an issue with bluez. See also: https://github.com/atar-axis/xpadneo/issues/295 There are several logs attached to that github issue, but let me know if i can provide any other useful info!