@meleu thanks meleu! now my cfg look like this;
input_device = "HORI CO.,LTD. POKKEN CONTROLLER"
input_driver = "udev"
input_l_btn = "4"
input_load_state_btn = "5"
input_start_btn = "9"
input_exit_emulator_btn = "4"
input_up_btn = "h0up"
input_a_btn = "2"
input_b_btn = "1"
input_reset_btn = "1"
input_enable_hotkey_btn = "8"
input_down_btn = "h0down"
input_r_btn = "5"
input_save_state_btn = "9"
input_r2_btn = "7"
input_right_btn = "h0right"
input_state_slot_increase_btn = "h0right"
input_x_btn = "3"
input_menu_toggle_btn = "3"
input_select_btn = "8"
input_y_btn = "0"
input_left_btn = "h0left"
input_state_slot_decrease_btn = "h0left"
input_l2_btn = "6"
which causes select+start to save state
select+right shoulder loads state
select+left shoulder exits
