Power Suite Ubuntu x86/Lockdown Utility/Advanced Shutdown Option
From ESS-WIKI
The purpose of this function is to modify the countdown seconds after pressing the power off button.
Step1. Select the “Lockdown Utility” page.
Step2. Set shutdown countdown seconds.
Step3. Click on "Confirm" to modify the setting.
Expect Result:
The countdown seconds after pressing the power off button will be modify.