Hi Roderick,

I just tried to see with evtest the values of gyro/accel after
changing the driver so that follows the suggestion on the dsremap
website: dividing by two speed_2x:
speed_2x = (gyro_speed_plus + gyro_speed_minus) >> 1;

The DS4 shows values no higher than 600000 (post-calibration) while 
heavily shaking the joystick. For the record, the calibration is:

gyro_pitch_plus: 8848   gyro_pitch_minus: -8853
gyro_yaw_plus: 8833     gyro_yaw_minus: -8827
gyro_roll_plus: 8856    gyro_roll_minus: -8841
gyro_speed_plus: 540    gyro_speed_minus: 540
acc_x_plus: 8107        acc_x_minus: -8107
acc_y_plus: 8259        acc_y_minus: -8259
acc_z_plus: 8187        acc_z_minus: -8186

This is an example of the output:

Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 128610
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 95747
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 61321
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 28864
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 874
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -27802
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -54949
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -82064
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -110398
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -138107
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -170345
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -205239
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -242320
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -281525
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -318043
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -356748
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -394453
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -430628
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -465428
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -496105
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -526469
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -551897
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -554865
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -522127
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -450933
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -323041
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -180404
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value -44859
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 71006
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 148353
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 202209
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 242757
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 274183
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 298456
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 316106
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 331569
Event: time [...], type 3 (EV_ABS), code 3 (ABS_RX), value 338942

Thanks,
Alain