Joystick axes not detected

[jorenko]

I'm trying to configure my joystick, and the game will allow me to map buttons, but when trying to map an axis, nothing is detected.

$ lsusb | grep Stick
Bus 002 Device 004: ID 044f:b108 ThrustMaster, Inc. T-Flight Hotas X Flight Stick
$ ls -la /dev/input/js0
crw-rw-r--+ 1 root input 13, 0 Apr 28 19:29 /dev/input/js0
$ cat /dev/input/js0
Ť�Z�Ť�Z�Ť�Z�Ť�Z�Ť�Z�Ť�Z�Ť�Z�Ť�Z�Ť�ZŤ�Z�	Ť�Z�
Ť�Z�
    Ť�Z�Ť�Z�Ť�Z�Ť�Z�Ť�Z�Ť�Z�Ť�Z�


#now I'll move the axes...
���Z����Z�����Z���Z���ZD��Z�}��Z�����Z���Zdi���Zg
                                                                     ��Z�
                                                                          ��Z>��Zdi>��Z�t��Z���Z/����Z����Z����Z��<��Z��<��Zn��Z��Z4���Z���Z��Z��<�Zn�Z���ZLC��ZtT�ZW6�Z�je�Z�\�Z�e��Z�,��Z

So it looks for all the world like the joystick exists and the axes are detected by the OS... but KSP won't see them.

I'm running 64-bit KSP 1.0 via Steam on Arch. The last time I used this stick with KSP was about a year ago, but on the same PC, and also on Arch; it worked just fine then, with no tweaking.