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In my opinion, the /sys/power/state file should be ON when system wakes up, and be mem when the system sleeps. But when I use adb shell cat /sys/power/state command to check the file contents, it is always mem, even when the system is awake.
Can anyone explain this behavior?
Reading this file gives the list of possible states.
You wouldn’t be able to read the file if the system was sleeping anyway. 🙂