linux-kernel - Re: [linux-usb-devel] possible USB regression with 2.6.21-rc4: iPod doesn't work

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Message-ID: <Pine.LNX.4.44L0.0703261712340.7079-100000@iolanthe.rowland.org>
Date:	Mon, 26 Mar 2007 17:15:53 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Tino Keitel <tino.keitel@....de>
cc:	Oliver Neukum <oneukum@...e.de>,
	<linux-usb-devel@...ts.sourceforge.net>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [linux-usb-devel] possible USB regression with 2.6.21-rc4: iPod
 doesn't work

On Mon, 26 Mar 2007, Tino Keitel wrote:

> > > There are no messages from the iPod because, well, nothing happens when
> > > I plug it in. I tried it 3 times.
> > 
> > I don't understand.  The dmesg log you attached shows the iPod was
> > detected and recognized as scsi5 (sdc).  Then some time later (can't tell
> > how much later because you don't have CONFIG_PRINTK_TIME set) it was
> > unplugged and plugged back in.  The second time it was detected and
> > recognized as scsi6 (also sdc).  And then the log ends.
> 
> Not in the attached dmesg output from the above mail. There are not
> iPod related messages it it, but I plugged it in 2 times. I rebootet
> with the same kernel version without CONFIG_USB_SUSPEND right after
> this and the iPod was recognized at the first try.

Sorry, I was reading the wrong file before!  :-(

The lack of messages from the iPod seems to indicate that the hub isn't
working right.  You could try plugging the iPod into a different hub or
directly into the computer.  Or maybe into a different port of that hub.

Alan Stern

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