Reply-To: akpm@linux-foundation.org

> On Fri, 25 Jan 2008 08:34:00 -0800 (PST) bugme-daemon@bugzilla.kernel.org
> wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=9815
> 
>            Summary: Unable to mount ipod
>            Product: Other
>            Version: 2.5
>      KernelVersion: 2.6.24
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Other
>         AssignedTo: other_other@kernel-bugs.osdl.org
>         ReportedBy: mas@mylug.org
> 
> 
> Latest working kernel version: 
> Earliest failing kernel version: 2.6.23
> Distribution: Debian
> Hardware Environment:
> Software Environment:
> Problem Description: Cannot mount ipod or an external hard disk
> 
> When I connect my ipod,
> I cannot mount it and I get the same error I was getting earlier.
> 
> Jan 25 15:50:04 brahman kernel: usb 1-2: new high speed USB device using
> ehci_hcd and address 94
> Jan 25 15:50:04 brahman kernel: usb 1-2: configuration #1 chosen from 1
> choice
> Jan 25 15:50:04 brahman kernel: usb-storage: USB Mass Storage device detected
> Jan 25 15:50:04 brahman kernel: usb-storage: -- associate_dev
> Jan 25 15:50:04 brahman kernel: usb-storage: Vendor: 0x05ac, Product: 0x1209,
> Revision: 0x0001
> Jan 25 15:50:04 brahman kernel: usb-storage: Interface Subclass: 0x06,
> Protocol: 0x50
> Jan 25 15:50:04 brahman kernel: usb-storage: Transport: Bulk
> Jan 25 15:50:04 brahman kernel: usb-storage: Protocol: Transparent SCSI
> Jan 25 15:50:04 brahman kernel: scsi874 : SCSI emulation for USB Mass Storage
> devices
> Jan 25 15:50:04 brahman kernel: usb-storage: *** thread sleeping.
> Jan 25 15:50:04 brahman kernel: usb-storage: device found at 94
> Jan 25 15:50:04 brahman kernel: usb 1-2: USB disconnect, address 94
> Jan 25 15:50:04 brahman kernel: usb-storage: storage_disconnect() called
> Jan 25 15:50:04 brahman kernel: usb-storage: usb_stor_stop_transport called
> Jan 25 15:50:04 brahman kernel: usb-storage: waiting for device to settle
> before scanning
> Jan 25 15:50:04 brahman kernel: usb-storage: -- usb_stor_release_resources
> Jan 25 15:50:04 brahman kernel: usb-storage: -- sending exit command to
> thread
> Jan 25 15:50:04 brahman kernel: usb-storage: *** thread awakened.
> Jan 25 15:50:04 brahman kernel: usb-storage: -- exiting
> Jan 25 15:50:04 brahman kernel: usb-storage: -- dissociate_dev
> Jan 25 15:50:04 brahman kernel: usb 1-2: new high speed USB device using
> ehci_hcd and address 95
> Jan 25 15:50:05 brahman kernel: usb 1-2: configuration #1 chosen from 1
> choice
> Jan 25 15:50:05 brahman kernel: usb-storage: USB Mass Storage device detected
> Jan 25 15:50:05 brahman kernel: usb-storage: -- associate_dev
> Jan 25 15:50:05 brahman kernel: usb-storage: Vendor: 0x05ac, Product: 0x1209,
> Revision: 0x0001
> Jan 25 15:50:05 brahman kernel: usb-storage: Interface Subclass: 0x06,
> Protocol: 0x50
> Jan 25 15:50:05 brahman kernel: usb-storage: Transport: Bulk
> Jan 25 15:50:05 brahman kernel: usb-storage: Protocol: Transparent SCSI
> Jan 25 15:50:05 brahman kernel: scsi875 : SCSI emulation for USB Mass Storage
> devices
> Jan 25 15:50:05 brahman kernel: usb-storage: *** thread sleeping.
> Jan 25 15:50:05 brahman kernel: usb-storage: device found at 95
> Jan 25 15:50:05 brahman kernel: usb-storage: waiting for device to settle
> before scanning
> Jan 25 15:50:05 brahman kernel: usb 1-2: USB disconnect, address 95
> Jan 25 15:50:05 brahman kernel: usb-storage: storage_disconnect() called
> Jan 25 15:50:05 brahman kernel: usb-storage: usb_stor_stop_transport called
> Jan 25 15:50:05 brahman kernel: usb-storage: -- usb_stor_release_resources
> Jan 25 15:50:05 brahman kernel: usb-storage: -- sending exit command to
> thread
> Jan 25 15:50:05 brahman kernel: usb-storage: *** thread awakened.
> Jan 25 15:50:05 brahman kernel: usb-storage: -- exiting
> Jan 25 15:50:05 brahman kernel: usb-storage: -- dissociate_dev
> 
> Incidentally, I can mount my pen drive of 1 GB capacity. But,
> I was not able to mount an external hard disk.
> 
> Steps to reproduce:
> 
> 
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On Fri, 25 Jan 2008, Andrew Morton wrote:

> > On Fri, 25 Jan 2008 08:34:00 -0800 (PST) bugme-daemon@bugzilla.kernel.org
> wrote:
> > http://bugzilla.kernel.org/show_bug.cgi?id=9815

> > Problem Description: Cannot mount ipod or an external hard disk

> > Incidentally, I can mount my pen drive of 1 GB capacity. But,
> > I was not able to mount an external hard disk.

Let's forget about the iPod and concentrate on the hard disk for now.  
What happens when you try to connect and mount it?  Can you provide the 
dmesg log?  To get more information, you should build a kernel with 
CONFIG_USB_DEBUG enabled.

Alan Stern

On Sat, Jan 26, 2008 at 11:10:50AM -0500, Alan Stern wrote:
   > 
   > Let's forget about the iPod and concentrate on the hard disk for now.  
   > What happens when you try to connect and mount it?  Can you provide the 
   > dmesg log?  To get more information, you should build a kernel with 
   > CONFIG_USB_DEBUG enabled.
   > 
Sorry for the delay. I am attaching the syslog when I connect the
external hdd. I am also attaching the syslog under the kernel 2.6.21.
FWIW, I am also attaching the syslog when I connected the ipod under
2.6.24.

Regards,

On Tue, 29 Jan 2008, Sridhar M.A. wrote:

> Sorry for the delay. I am attaching the syslog when I connect the
> external hdd. I am also attaching the syslog under the kernel 2.6.21.
> FWIW, I am also attaching the syslog when I connected the ipod under
> 2.6.24.

You're getting lots of disconnect events.  It could be a power supply 
problem, or a problem in the cable connections, or a problem in the 
computer's USB controller, or a problem in the devices themselves.

Do the disk drive and the iPod work okay when you plug them into a 
different computer?  Have you tried using different USB ports?  Have 
you checked the cables inside the computer case?  Have you tried using 
different external USB cables?

Alan Stern

On Tue, Jan 29, 2008 at 10:58:14AM -0500, Alan Stern wrote:
   > 
   > You're getting lots of disconnect events.  It could be a power supply 
   > problem, or a problem in the cable connections, or a problem in the 
   > computer's USB controller, or a problem in the devices themselves.
   > 
   > Do the disk drive and the iPod work okay when you plug them into a 
   > different computer?  Have you tried using different USB ports?  Have 
   > you checked the cables inside the computer case?  Have you tried using 
   > different external USB cables?
   > 
Yes, I have tried it on 3 different machines with identical results. I
also did change the ports to which the devices are plugged and ended up
with the same result. I will once again try changing the cables and see
what happens.

Assuming that the cable/port are at fault, how come my card reader and
pendrive work on the same setup?

Regards,

If you get the same results on several different computers, that indicates the problem most likely isn't in the computer.  It could be in the cables, but if your card reader and pendrive work okay with the same cables then it probably isn't there either.  That leaves just the devices.

On Wed, Jan 30, 2008 at 07:31:46AM -0800, bugme-daemon@bugzilla.kernel.org wrote:
   > 
   > ------- Comment #6 from stern@rowland.harvard.edu  2008-01-30 07:31 -------
   > If you get the same results on several different computers, that indicates the
   > problem most likely isn't in the computer.  It could be in the cables, but if
   > your card reader and pendrive work okay with the same cables then it probably
   > isn't there either.  That leaves just the devices.
   > 
Well, suspected as much and tried again by straightening/pulling the
cable. It worked! Am really sorry about this issue :-( I suspect the
cables are having a role in the different devices : my card reader and
key drive function normally on that, but ipod does not. _Maybe_ there is
an issue about the current drawn by different devices that causes it to
fail.

Thanks for the help.

Regards,