Re: [BUG] 2.6.32 - Sddr-09 SM reader resets endlessly

[Alan Stern]

On Thu, 3 Dec 2009, Ed Tomlinson wrote:

> Hi,
> 
> Just booted in 2.6.32 and shortly after the boot finished my console was spammed with:
> 
> [   72.221620] usb 7-4.1: reset full speed USB device using ehci_hcd and address 5                                                           
> [   72.375589] usb 7-4.1: reset full speed USB device using ehci_hcd and address 5                                                           
> [   72.529568] usb 7-4.1: reset full speed USB device using ehci_hcd and address 5                                                           
...

> I noticed the leds on the devince blinking and unplugged it.  The messages stopped.
> 
> Plugging it in to another port gave:
> 
> [  120.096590] usb 7-4.2: new full speed USB device using ehci_hcd and address 7                                                             
> [  120.188421] usb 7-4.2: New USB device found, idVendor=0781, idProduct=0200                                                                
> [  120.196857] usb 7-4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0                                                           
> [  120.205801] usb 7-4.2: Product: USB SSFDC                                                                                                 
> [  120.205803] usb 7-4.2: Manufacturer: SanDisk                                                                                              
> [  120.206023] usb 7-4.2: configuration #1 chosen from 1 choice                                                                              
> [  120.210375] scsi10 : SCSI emulation for USB Mass Storage devices                                                                          
> [  120.210625] usb-storage: device found at 7                                                                                                
> [  120.210627] usb-storage: waiting for device to settle before scanning                                                                     
> [  125.210356] scsi 10:0:0:0: Direct-Access     Sandisk0 ImageMate SDDR-0 0208 PQ: 0 ANSI: 0                                                 
> [  125.221014] sd 10:0:0:0: Attached scsi generic sg8 type 0                                                                                 
> [  125.538583] usb 7-4.2: reset full speed USB device using ehci_hcd and address 7
> [  125.693592] usb 7-4.2: reset full speed USB device using ehci_hcd and address 7
> [  125.846595] usb 7-4.2: reset full speed USB device using ehci_hcd and address 7
...

> just in case it happened to be an interaction with the hub used I tried another:
...

> with the same results.
> 
> Ideas? 

More information is needed.  Collect a usbmon trace showing what 
happens when the device is plugged in.  Instructions are in the kernel 
source file Documentation/usb/usbmon.txt.

Alan Stern

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