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When I go to bed, I usually put my Samsung Galaxy Ace in airplane mode to use it as an alarm clock/music player, while saving battery. I can enter that mode successfully.

However, after I enter that mode, sometimes I can't leave that mode since the option (the second one in the list) is greyed out: I have to reboot. Any ideas?

What I see

I'm using Android 2.3.4 and my phone is rooted.

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If you want to go in offline mode, why does title say, get out of offline mode? –  Sachin Shekhar May 28 '12 at 0:13
    
@SachinShekhar, I am in offline mode but I can't get out of it. Editing my question to clarify –  Renan May 28 '12 at 0:18
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Offline mode? You mean airplane mode? –  Richard Borcsik May 28 '12 at 12:15
    
@RichardBorcsik exactly ("airplane mode" was translated as "offline mode" in Portuguese). Editing my question. –  Renan May 28 '12 at 12:17
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For what it's worth, I've occasionally seen this too, and at completely random times. Worse, I've had it happen on both my old Droid and my new Galaxy Nexus. I think it's just a hard-to-find bug in Android. –  Al E. Jun 27 '12 at 12:48
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2 Answers 2

If you either go to airplane mode each night, you might want to try out some automating app like Timeriffic (free) or Tasker (~EUR 5) which could switch on airplane mode at night, and automatically switch it off in the morning. This way you do not get stuck with a grayed-out menu item -- and in case you do and need to get out of it, you may just need to play with some profile in this app.

Another alternative would be using some toggle-switcher (e.g. Elixier or Power Toggles), which provide you with widgets to switch airplane mode and more.

Also, on many Android devices, there's a pre-installed widget available which usually also includes airplane mode -- mostly called something like "Power Widget" or "Energy Widget"; just check the lists of widgets available to be added on your device.

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Try getting out of off-line mode while your phone is charging. If that always works the battery might grow old.

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I have the same problem on a brand new Samsung Sidekick 4G, so I would think the battery is not at fault. –  Logos May 28 '12 at 13:31
    
My Galaxy Ace is not old, either (I have had it for about 45 days), so I don't think the battery is problem. –  Renan May 28 '12 at 16:51
    
Well, did you try putting it in and out of offline mode right after restart? I mean without having any applications open? Maybe one of them is in conflict especially since it's rooted. –  Vlad May 28 '12 at 19:59
    
After restart it always works; this only happen after the phone has been in use for a while. –  Renan May 28 '12 at 21:15
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Could be a glitch in 2.3.4 where Airplane mode takes the wakelock and prevents it from being released.. –  t0mm13b Jun 27 '12 at 14:01
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