Ubuntu lack of uniformization​?

I suggest you report a bug

A Bash script that beeps when battery gets low.

This solution is simple, one creates a "/home/user/power-low.sh" file with the bellow code, and in the OS Ubuntu, exists a setup tool, "Startup Applications" (gnome-session-properties, included file of DEB package: gnome-session-bin), where I added a line to start the command at login "/bin/bash /home/user/power-low.sh" and it works!

<code>
#! /bin/bash
# programmed by João Miguel Lopes Moreira (mailto:<email address hidden>)
# Power-low.sh
# the loop works all the time, and beeps if battery state is discharging and battery percentage is bellow 7%
declare -i vStop=0;
declare -i vMin=6;
declare -i vNum=99;
declare -i vBeep=0;
declare vBat=$(upower -e | grep -E "BAT0");
declare vCmd1='upower -i';
declare vCmd2='grep -E "state"';
declare vCmd3='grep -E "percentage"';
while (( $vStop == 0 )) ; do
  declare v1=$(eval $vCmd1 $vBat '|' $vCmd2);
  if (( "$vBeep" == "0" )) ; then
    if [ ${v1: -11} == "discharging" ] ; then
      declare v1=$(eval $vCmd1 $vBat '|' $vCmd3);
      declare -i v2=${v1: -3:2};
# if percentage less or equal to 6% start beeping
      if (( "$v2" <= "$vMin" )) ; then
        declare -i vBeep=1;
      fi
    fi
    if (( "$vBeep" == "0" )) ; then
      sleep 3m;
    fi
  else
# stop beep if charging starts
    if [ ${v1: -11} != "discharging" ] ; then
      declare -i vBeep=0;
    else
# beep
      totem-audio-preview "/usr/share/indicator-power/sounds/Low battery.ogg" && sleep 5s
    fi
  fi
done
exit 0
</code>

Best regards,
João Moreira.

What bug?

This question was expired because it remained in the 'Open' state without activity for the last 15 days.