dualshock 4: no rumble support
linux-vanilla, alpine edge
DualShock 4 for some reason doesn't have rumble support:
$ fftest /dev/input/by-id/usb-Sony_Interactive_Entertainment_Wireless_Controller-if03-event-joystick
Force feedback test program.
HOLD FIRMLY YOUR WHEEL OR JOYSTICK TO PREVENT DAMAGES
Device /dev/input/by-id/usb-Sony_Interactive_Entertainment_Wireless_Controller-if03-event-joystick opened
Features:
* Absolute axes: X, Y, Z, RX, RY, RZ, Hat 0 X, Hat 0 Y,
[3F 00 03 00 00 00 00 00 ]
* Relative axes:
[00 00 ]
* Force feedback effects types:
Force feedback periodic effects:
[00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ]
* Number of simultaneous effects: 0
Uploading effect #0 (Periodic sinusoidal) ... Error:: Function not implemented
Uploading effect #1 (Constant) ... Error: Function not implemented
Uploading effect #2 (Spring) ... Error: Function not implemented
Uploading effect #3 (Damper) ... Error: Function not implemented
Uploading effect #4 (Strong rumble, with heavy motor) ... Error: Function not implemented
Uploading effect #5 (Weak rumble, with light motor) ... Error: Function not implemented
Enter effect number, -1 to exit
Tested with few games that also doesn't have force feedback.