Re: USB storage fails to initialize device for MP3 player. How to debug?

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Alan Stern wrote:
What version of the Linux kernel are you using?

2.6.35.3-smp

 What shows up in
"lsmod" after you plug in the player?

If I save output of lsmod before and after plugging the player and run diff with the two logs, then the only line, that gets added, is usb-storage

 And what do you see in
/proc/scsi/usb-storage?

After plugging in *just* this player (no other usb storage device), I don't have /proc/scsi/usb-storage at all.

If you can, try building a kernel with CONFIG_USB_STORAGE_DEBUG enabled
and then see what shows up in the dmesg log when the player is plugged
in.

Did so:

usb 2-1: new high speed USB device using ehci_hcd and address 6
usb 2-1: New USB device found, idVendor=0402, idProduct=5668
usb 2-1: New USB device strings: Mfr=3, Product=1, SerialNumber=2
usb 2-1: Product: Intenso Music Walker
usb 2-1: Manufacturer: ALi Corp.
usb 2-1: SerialNumber: 91029639100000001403
usb-storage: USB Mass Storage device detected
usb-storage: -- associate_dev
usb-storage: Vendor: 0x0402, Product: 0x5668, Revision: 0x0002
usb-storage: Interface Subclass: 0x06, Protocol: 0x50
usb-storage: Transport: Bulk
usb-storage: Protocol: Transparent SCSI
scsi10 : usb-storage 2-1:1.0
usb-storage: *** thread sleeping.
usb-storage 2-1:1.0: device found
usb-storage 2-1:1.0: waiting for device to settle before scanning
usb-storage: storage_disconnect() called
usb-storage: -- usb_stor_release_resources
usb-storage: -- sending exit command to thread
usb-storage: *** thread awakened.
usb-storage: -- exiting
usb-storage: -- dissociate_dev

Yours

Manuel

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