thanks for the numerous hints and commands but i still don't know with which cmd i can set a special mhz on my 1622
(iSerial 3 GS-10051622)
so that it doesn't restaret all the time

cmd on linux, insert: ./cgminer -o ... -u ... -p x --gekko-serial "GS-10051622"
then, only 1622 stick is selected for mining.