Thank you for taking the time to answer me!
You are right, after your answer, I did a research, and you are right: If all electric power is lost AND HYD pressure is available, stabiliser is operative with alternate pitch trim levers, which mechanically move directly the stabilizer, and also you have Spoilers 4 & 11 which are mechanically controlled through a cable from the control wheel, and also the rudder.
So, the 777 is ok, but in the case of a complete electrical loss on the A380, what are the backup ?
Because if we have a TOTAL HYD loss on the A380, RAT supplies power to EHA and EHBA, (not to Blue or Green system as the 320 or 330 family) which is just some Electrical Flight Controls, that powers with reduced performance to Ailerons, Elevator, Rudder, some spoilers and slats.
So, if we have a COMPLETE ELECTRICAL loss on the A380, we have RAT which supplies Electric to the aircraft and to electrical flight controls.
But if we have a TOTAL FLIGHT COMPUTERS failure ? (PRIMary, and SECondary), how can we control this big bird ? Because I know that the A380 don't have mechanical control, there is a pitch trim switch and not a wheel as the A320, but I thought that this switch is also electrically powered, so we can not use this switch in the case of a complete loss of all flight computers. And for the Rudder ? I think it is also powered from flight computers (P1,S1, P2,S2) for the upper rudder, and (P1 ,S1, P3, S3) for the lower rudder, but moved thanks to Yellow and Green Hydraulic OR Electrically (EHA), but we can't move it due to loss of flight computers right ?