The wake up alarm is due to the hibernating after sleep
- Open Power Options
- Change plan settings
- Change advanced power settings
- Change hibernate after"Sleep" > "Hibernate after" values
- Goto sleep state
- Wake up
- Run in terminal:
powercfg /SLEEPSTUDY
- Open created file
C:\WINDOWS\system32\sleepstudy-report.html
- Find latest section (near the bottom)
- The diff time == the hibernate after time