FS#2611 - USB Transfer failes with Battery level < nearly full

Attached to Project: Rockbox
Opened by Anonymous Submitter - Wednesday, 03 August 2005, 05:19 GMT
Last edited by Linus Nielsen Feltzing (linusnielsen) - Monday, 22 August 2005, 13:28 GMT
Task Type Bugs
Category Battery/Charging
Status Closed
Assigned To No-one
Operating System
Severity Low
Priority Normal
Reported Version Release 2.4
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No


Transferring files with USB to Rockbox is not possible
if the Batteries are not nearly full. The Disk spins up
for a few seconds when Rockbox is connected to USB.
After that the disk goes into parking position as if
the batteries where empty. A few seconds later the disk
tries to spin up again and goes into parking position
again. This repeats and i get no access to Rockbox.
Using Original Firmware (Pressing "-" during Boot)
solves this Problem. It is not a hardware problem. The
lastest daily builds of Rockbox still have this poblem.
This task depends upon

Closed by  Linus Nielsen Feltzing (linusnielsen)
Monday, 22 August 2005, 13:28 GMT
Reason for closing:  Fixed
Comment by Jonas Häggqvist (rasher) - Wednesday, 17 August 2005, 07:12 GMT

How much is "not nearly full"?

I have not experienced this, and have used USB mode in
pretty much all battery conditions.

Sounds more like it was almost empty, although the iriver
firmware shouldn't be able to boot then.
Comment by Jonas Häggqvist (rasher) - Wednesday, 17 August 2005, 07:35 GMT

Sorry, disregard that last comment I was for some reason
assuming that you were using an iriver, which is clearly not
the case.

However, what player model do you have?
Comment by Anonymous Submitter - Thursday, 18 August 2005, 13:42 GMT

Battery Level not nearly full means a real remaining time of
more than 10 hours (tested). But now i think the level does
not matter - even more the time after charging the
batteries. if the voltage is at about 5,9v, usb transfer is
possible with rockbox firmware. if the voltage is lower, due
to slightly discharged batteries, the transfer fails. using
original firmware solves this problem.
Comment by Anonymous Submitter - Thursday, 18 August 2005, 13:44 GMT

Forgot my player model: What do you want to know? It is the
"new" player version with flashable firmware.
Comment by Linus Nielsen Feltzing (linusnielsen) - Thursday, 18 August 2005, 16:49 GMT

OK, based on your description of the problem, it looks like
your batteries are worn out, or your battery connectors are

Does the disk spin down wnen you enter USB mode with the
Archos firmware?

Spinning up the disk is the far most power consuming
operation, and failure to spin up with almost full batteries
is a sure sign of battery wear or bad connectors.
Comment by Anonymous Submitter - Friday, 19 August 2005, 06:31 GMT

My batteries are new (~2400mAh, 14h lifetime). With Archos
original Firmware ("-" while connecting USB) the disk spins
up and runs until the jukebox is displayed in explorer.
Every transfer is possible, i tried some iso-images (about
1gb). With rockbox firmware the disk tries to spin up but
immediatly spins down, then spins up, spins down, but the
disk is not displayed in explorer.
Comment by Linus Nielsen Feltzing (linusnielsen) - Friday, 19 August 2005, 06:49 GMT

You didn't answer my question if the disk spins down when in
the Archos USB mode.

Anyways, I'd like you to try this build to see if it solves
your problem:
Comment by Anonymous Submitter - Saturday, 20 August 2005, 07:32 GMT

First i tried the rockbox-usbtest. Seems to solve the
problem. But a little spinup/spindown problem still exists.
Sometimes during transfer the disk spins down and directly
up. I could not recognize this behaviour with the original
archos firmware.

What do you mean with your question? Spin down when used in
USB mode with the original firmware? I would say it spins
down never if connected.
Comment by Linus Nielsen Feltzing (linusnielsen) - Monday, 22 August 2005, 13:28 GMT

OK. Thanks for the input. I'll commit this change to CVS and
close this report.