wireless - why does my script not run on wakeup - Ask Ubuntu

i've followed istructions found on run script on wakeup? following: have asus zenbook , since upgraded 16.04, wifi stays disconnected on resume. wrote script can execute manually after wakeup (and entering root pewd) , hooks wifi adapter network. script looks like:

$ cat wifi-resume.sh  systemctl restart network-manager.service 

so, following instructions created script in /usr/lib/pm-utils/sleep.d/ called 96wifi-resume looks like:

# cat 96wifi-resume  #!/bin/sh # on asus zenbook, script used restart wifi on resume. # date 11/04/2016 ron eggler  [ -f /bin/systemctl ] || exit $na  case "$1" in         hibernate|suspend)                 exit $na                 ;;         thaw|resume)                  systemctl restart network-manager.service                 ;;         *) exit $na                 ;; esac 

permissions set -rwxr-xr-x 1 root root still not seem work, why not, doing wrong here?

edit 1

however, have replaced exit $nas exit 0 , still doesn't seem work correctly, however, when call :/usr/lib/pm-utils/sleep.d# ./96wifi-resume resume shell, seems work expected