On Wed, 24 Jul 2013, Laurent Bigonville wrote:

> Le Tue, 23 Jul 2013 10:16:00 -0400 (EDT),
> Alan Stern <st...@rowland.harvard.edu> a écrit :
> 
> > On Tue, 23 Jul 2013, Laurent Bigonville wrote:
> > 
> > > Hi,
> > > 
> > > This is probably a minor issue, but when plugin the Fitbit base
> > > station dongle, I'm getting some weird serial number in dmesg.
> > > 
> > > Can something be done here?
> > > 
> > > Kind regards
> > > 
> > > Laurent Bigonville
> > > 
> > > [ 9993.722197] usb 1-1.2: new full-speed USB device number 7 using
> > > ehci-pci [ 9993.820617] usb 1-1.2: New USB device found,
> > > idVendor=2687, idProduct=fb01 [ 9993.820622] usb 1-1.2: New USB
> > > device strings: Mfr=1, Product=2, SerialNumber=3 [ 9993.820625] usb
> > > 1-1.2: Product: Fitbit Base Station [ 9993.820627] usb 1-1.2:
> > > Manufacturer: Fitbit Inc. [ 9993.820629] usb 1-1.2: SerialNumber:
> > > \xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf\xffffffef\xffffffbf\xffffffbf\xffffffbf\xffffffbf
> > 
> > It may be that, weird as this looks, it is actually correct.
> > 
> > Can you post a usbmon trace showing what happens when the dongle is 
> > first plugged?  Instructions are in the kernel source file 
> > Documentation/usb/usbmon.txt.
> 
> I hope this is enough:

Yes it is.  Here is the important part:

> ffff880170d62e00 3460787712 S Ci:7:009:0 s 80 06 0303 0409 00ff 255 <
> ffff880170d62e00 3460788448 C Ci:7:009:0 0 34 = 2203ffff ffffffff ffffffff 
> ffffffff ffffffff ffffffff ffffffff ffffffff

This shows the Unicode characters of the serial-number string
descriptor as sent by the device.  They really are all 0xffff.

The weird serial number in the dmesg output is correct -- it's the
device that is faulty.

Alan Stern

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