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Every day at midnight the display on my tablet (Asus Transforer TF101 ICS) turns on for a few seconds. Ordinarily, this wouldn't be a big deal, but I am using the Screebl application, which keeps the tablet awake when it's vertical. Thus, the device turns on in my bag and then never goes to sleep, draining the battery.

Is there a way to find out what application (or system component) is waking the device up at midnight, and how does one stop this behavior?

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Hmm, if it drains battery then one easy way to check would be to let it drain and see what what application drained your battery from battery status. – roxan May 2 '12 at 5:26
@roxan It's not the application that's draining the battery, but the screen. – SaintWacko May 2 '12 at 16:31
converted to an answer... – ce4 Jun 8 '12 at 21:36

try to trigger it manually.

Root reqired:
Install BetterBatteryStats to view 'alarms', aka programmed low level device wakeups (you can find a free .apk on xda here, search for 'Attached' ). set your clock just before midnight and reset bbs' logs.

If you can trigger it, you should see which app has caused a wakeup in BBS' log.

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I had the same problem. After turning off the network time, I set it back manually and then it didn't turn on the screen at midnight.

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