Rockbox General > Rockbox General Discussion
[UPDATED] battery draining completely even after ipod has been manually shut off
Elbo:
Well mine didn't refuse to boot up at first. It booted up, my battery percentage said "1" then it shut off. I plugged it in and it started to charge. I figured that was drained.
Chronon:
Okay. So Rockbox booted up okay and reported a low battery? That's good to know.
You can also try an older build (maybe a week ago for starters) to see if this is a problem that cropped up recently, as it did for iambigjilm. If that's the case then we can try to narrow down on which revision caused this behavior.
It's also possible that this is either hardware related or depends on some initializations performed by Apple code. I know that a number of iPod users complain of faulty low battery warnings using unmodified Apple firmware also. This could indicate faulty hardware. I have also read reports of firmware upgrades by Apple improving this behavior -- presumably they changed something in the way they initialize the hardware at boot time. I have no idea whether this applies to your case or not.
iambigjilm:
--- Quote from: Chronon on November 02, 2007, 01:29:01 PM ---iambigjilm mentioned that this only started happening a couple of days ago.
--- End quote ---
yes, Rockbox had been installed on mine for about a week before this started happening. and no changes were made until after I started having the problem.
--- Quote from: Chronon on November 02, 2007, 01:29:01 PM ---But you could always test the behavior by setting an alarm to go off in a few minutes and then shutting the player off and setting the hold switch. I wouldn't be surprised to find that the alarm flags and boots up Rockbox.
--- End quote ---
I just tried this and Rockbox does in fact boot into the Apple firmware even though hold is on. (I was under the impression that the ipod wouldn't boot up at all when in the hold position. I assumed you had to start the boot and then switch hold on in order to boot back to the apple firmware. Guess that shows me for assuming!)
Now my question is why is the alarm coming on when I have it disabled? (At least I think I have it disabled.) I go to the alarm setting and there are 2 choices...
1. SELECT=Set
2. MENU=Cancel
I know for a fact that I clicked MENU to cancel it last night, but it still displays an alarm time. Is that normal?
--- Quote from: Chronon on November 02, 2007, 01:29:01 PM ---But it still seems like the idle poweroff should shut the system down again.
--- End quote ---
That's what I would think as well. And I actually do have the idle poweroff set to 10 minutes. Maybe I'm missing something here, but if the alarm is set to go off at say... 11PM and hold is on, it would boot into the apple firmware, correct? Afaik, I do not have it set to repeat playback in either Rockbox or apple, so I'm confused as to why it stays on, if that is in fact what it's doing, and draining th battery.
Oh, and I did upgrade to build r15392-071101, so the problem has happened to me with 2 separate builds.
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update
I have confirmed that the reason for my constant low battery was in fact due to the wake-up alarm being set, or at least that's what I'm going with. Since determining that as being the culprit, I have changed the wake-up alarm to go off during the day (if it decides it wants to go off again) so I will be near it to switch it back off, and have had zero problems losing battery power.
I would like to thank BigBambi and Chronon for their help. I feel a little embarrassed that that was what was causing the problem (since I thought I had checked it), but I still don't understand why Rockbox would still boot up even in hold mode. That and the fact that it went off once (and only once) when I had disabled the alarm. No matter, it is now working properly and I am a happy Rockbox user, again!
update #2
It seems I spoke too soon. I checked the battery life just before posting that first update and it showed 95%. I manually shut it down and set it aside until I got a break from work to crank some tunes. Unfortunately the battery has since completely drained. (What?!?! How?!?!) I have no idea. Of course it's completely dead, so I cannot check any of the settings, but I know for a fact that the alarm was not set for this early in the morning, so I'm pretty positive that's not the problem. Oh well, back to square one. :(
punchcutter:
I just wanted to report my experience, and maybe bump this thread back up to the top :) This is about my 4G greyscale, just as for OP.
I have been having this same problem. I never knew about the alarm thing... I haven't had a chance to check that and test again (will do). I've never set the alarm, so I don't know why that would be happening.
My RB firmware is from probably about a month ago, and my vague memory is that this didn't start happening right away, but it took a couple weeks. My symptoms: I shut the thing down - even make sure to see the little "Shutting down" splash message. Put it aside for a long time, and when I try to reawaken, I get a low battery icon for an instant, and then blankness. If I plug it back in, I still don't get any feedback on the screen, but after a while of being plugged in, I can finally revive it by pressing the reboot sequence over and over, and randomly banging on other buttons. By doing the reboot over and over with the two thumbs, it almost feels like I'm giving it CPR :)
I had intended to post here saying I'm giving up on RB because the power management is just not ready for normal use, but now I see this may just be a bug introduced recently. I will check my alarm and do one more test with the current version I'm running, then try upgrading to a daily build and see how it compares.
It worries me a bit to keep doing this, because I think someday the CPR will stop working and it just won't wake up again.
Dave
iambigjilm:
yes, check your alarm. i did not set mine in the beginning either, but it seems that that was the culprit. since my last update i have concluded that as long as i do not switch hold on i'm fine. for some reason i only lose power when hold is on. i don't know why, but that's what is working for me now.
i used hold in the past to make sure that it wouldn't turn on if something hit it in my backpack, but now i retain pretty much all battery power when leaving hold off at all times.
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