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FS#10164 - Cannot charge iPod from Rockbox on low battery

Attached to Project: Rockbox
Opened by Jakub Matoušek (kubiix) - Friday, 24 April 2009, 08:50 GMT+2
Task Type Bugs
Category Battery/Charging
Status Unconfirmed
Assigned To No-one
Player Type iPod 4G Color
Severity Low
Priority Normal
Reported Version Daily build (which?)
Due in Version Undecided
Due Date Undecided
Percent Complete 0%
Private No

Details

When the battery is low, Rockbox is unable to charge iPod. When booting into Rockbox, the charging icon is displayed, but after a while the device shuts down.

Booting the OF and charging under it for few minutes is required.
This task depends upon

Comment by Boris Gjenero (dreamlayers) - Saturday, 25 April 2009, 03:53 GMT+2
When does the shutdown happen? Is it during intense disk activity? Is the disk still spinning when the shutdown happens? Does the iPod charge very slowly in Rockbox compared to in the original firmware?

I guess you are talking about USB charging, and I expect FireWire charging does not have this problem.
Comment by Jakub Matoušek (kubiix) - Saturday, 25 April 2009, 12:21 GMT+2
I don't have my iPod here now, so I can't test all the things you wrote, but it happens when using USB wall charger
Comment by Nate Rowe (Spanky) - Wednesday, 13 May 2009, 07:48 GMT+2
I think I can vouch for this as well. I currently have r20820 on my iPod but I firmly believe this has been a problem since before 3.2, maybe even 3.1. I'll leave my iPod booted into Rockbox, plugged into a AC adapter and the battery actually discharges to nothing until the device shuts down. But the frustrating part is that the iPod turns back on since it think you just plugged in the AC adapter, but it has almost 0 power so it shuts off. It continues this process throughout the night while I sleep. It's happened more than twice and it's pretty annoying. Not only will it do the above but the remaining time and percentage seem to be messed up after plugging in the AC adapter. Also, after I unplug the AC adapter (when there's still battery life and it's still booted into Rockbox) it thinks I just unplugged the USB cable and flashes the USB image.

Just noticed that the poster has a 4G Color, so do I. Or, rather a "iPod Photo".
Comment by UltraMagnus001 (ultramagnus0001) - Wednesday, 30 September 2009, 00:46 GMT+2
I have the same problem as spanky. I plug it into my computer and when I try to sync after about 5 min battery fully discharges and then iPod keeps rebooting. I can boot into he original iPod firmware and it will say battery is really low and go into charge only mode for a while. Then I can sync with the original IPod firmware.
I read about this problem here http://dreamlayers.blogspot.com/2008/12/video-ipod-wont-charge-via-usb-wont.html
But I can still charge in IPod mode and Rockbox. Just seems to happen when there's intense disk activity, which leads me to believe it's using more than 500ma and not using USB power for excess activity.
Comment by Dave Hooper (stripwax) - Sunday, 18 October 2009, 04:12 GMT+2
Please see http://www.rockbox.org/wiki/WebHome?topic=TargetStatus . ipods from 4th gen, color/photo, and 5th gen, video, do not have good power charging in rockbox yet. It is a known issue (with no solution as yet, as far as I know). I think it's always been an unresolved issue (not just something since 3.1). For now the recommended solution has been to charge using the original firmware.
I'll leave this bug tracker open .. since it is a bug and the workaround is unpleasant ..
Comment by 252 (252-rer) - Tuesday, 14 August 2012, 23:57 GMT+2
This is still a problem. What happens is if the battery is totally drained the original firmware goes into low power charge mode to get some power on the device. If left on its own it will boot into rockbox when done, find that it is charging from the wall start charging but also recognize that it is very low power and shut off. Then it again recognizes it is plugged into the wall and turns back on. It then recognizes its very lower power and shuts off. If this cycle uses up enough power it goes back into original firmware lower power mode and charges a bit then the cycle begins anew.

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