fftest doesn't do anything

[parkerlreed]

All the effects say they uploaded fine but there's no response selecting any of them. Is there any way to test the effects in general?

[parker@e55 bin]$ fftest /dev/input/event20
Force feedback test program.
HOLD FIRMLY YOUR WHEEL OR JOYSTICK TO PREVENT DAMAGES

Device /dev/input/event20 opened
Features:
  * Absolute axes: X, Y, Z, RZ, Hat 0 X, Hat 0 Y, 
    [27 00 03 00 00 00 00 00 ]
  * Relative axes: 
    [00 00 ]
  * Force feedback effects types: Constant, Periodic, Ramp, Spring, Friction, Damper, Rumble, Gain, Autocenter, 
    Force feedback periodic effects: Square, Triangle, Sine, Saw up, Saw down, 
    [00 00 00 00 00 00 00 00 00 00 BF 1F 03 00 00 00 ]
  * Number of simultaneous effects: 16

Setting master gain to 75% ... OK
Uploading effect #0 (Periodic sinusoidal) ... OK (id 0)
Uploading effect #1 (Constant) ... OK (id 1)
Uploading effect #2 (Spring) ... OK (id 2)
Uploading effect #3 (Damper) ... OK (id 3)
Uploading effect #4 (Strong rumble, with heavy motor) ... OK (id 4)
Uploading effect #5 (Weak rumble, with light motor) ... OK (id 5)
Enter effect number, -1 to exit
4
Now Playing: Strong Rumble
Enter effect number, -1 to exit
5
Now Playing: Weak Rumble
Enter effect number, -1 to exit
^C

[parkerlreed]

Oh I see https://github.com/berarma/ffbtools has ffbplay. I assume fftest is just older and doesn't know what to send?

[berarma]

The fftest command is older but it uses the same API and it's totally compatible. It uses a strange mix of parameters to play the effects though.

And that's why it has helped us unveil a bug where effects didn't play if the global gain setting wasn't at the max level. This doesn't normally happen because most applications leave it at the maximum setting.

Last commit fixes this issue.