Power Suite Ubuntu x86/Lockdown Utility/Advanced Boot Option
From ESS-WIKI
The purpose of this function is to remove the Ubuntu logo that appears when turning on and off the computer and locking the screen.
Step1. Select the “Lockdown Utility” page.
Step2. From Advanced Boot Option area, click "Ubuntu Boot Logo" or "Lock Screen"
Step3. Click on "Confirm" to modify the setting.
Expect Result:
The next time you reboot or enter the lock screen, you will no longer see the Ubuntu logo.