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Is there a command I can enter in a terminal emulator to put my phone or tablet into a low power, instant on state? My tablet lacks that option from the press-and-hold-power menu.

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Android devices typically don't implement this (some discussion related to is can be found in Do Android 3.0 tablets have standby/hibernate mode?) – eldarerathis Nov 9 '12 at 2:49
All my Gingerbread devices implement this feature except for my droid X which I recently installed ICS on and the developer didn't add that feature. And my tablet is ICS not Honeycomb. Was this feature removed/left out after Gingerbread? – mjwhitta Nov 9 '12 at 19:55
I don't think I've ever actually seen a device that supports something akin to hibernation, including ones running GB. What do you use (as in, what command/menu item) on the older ones to put them into that state? How do they behave in that state? – eldarerathis Nov 9 '12 at 20:06
I press and hold the power button and select "Sleep" which states that it is "low power, instant on" mode. I said hibernate b/c android has a built in sleep mode when the display shuts off and the cpu cycles down. When I do Google searches using the term Sleep I find nothing so I chose to use the term Hibernate here. In the "Sleep" state they turn almost completely off. In order to leave this state I have to hold the power button again but the phone instantly boots back to the home screen (no boot logo or boot animation) – mjwhitta Nov 13 '12 at 15:09
input keyevent 26 is what you're looking for. You would need root access to execute it. – Firelord Sep 11 '15 at 22:47

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