The failure to go into autotune is perhaps because the sticks arent centered?
I have looked into the logfile: all sticks were centered. The exact values were very close to the RCn_TRIM/SERVOn_TRIM valus (+- 11 maximal), except for the throttle value, Perhaps this is the reason for this issue:
RC1_TRIM,1497 SERVO1_TRIM,1497 , RCIN.C1 = 1500
RC2_TRIM,1494 SERVO2_TRIM,1494 , RCIN.C2 1495
RC3_TRIM,984 SERVO3_TRIM,984 , RCIN.C3 1510
RC4_TRIM,1508 SERVO4_TRIM,1508 , RCIN.C4 1497
I will try again after repeating the radio calibration