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USB device connection error



Hi,
I have USB device, a palm T5 PDA. When connecting to the linux desk
top (F6  Linux  2.6.22.9-61.fc6 #1 SMP Thu Sep 27 18:07:59 EDT 2007
x86_64 x86_64 x86_64 GNU/Linux), it plays a random game. Some time it
connected to the desktop successfully with those message (dmesg):

usb 4-1: new full speed USB device using uhci_hcd and address 76
usb 4-1: configuration #1 chosen from 1 choice
visor 4-1:1.0: Handspring Visor / Palm OS converter detected
usb 4-1: Handspring Visor / Palm OS converter now attached to ttyUSB0
usb 4-1: Handspring Visor / Palm OS converter now attached to ttyUSB1
usb 4-1: USB disconnect, address 76
visor ttyUSB0: Handspring Visor / Palm OS converter now disconnected
from ttyUSB0
visor ttyUSB1: Handspring Visor / Palm OS converter now disconnected
from ttyUSB1
visor 4-1:1.0: device disconnected

In bad times, I can't connect it to desktop at all and got errors alike this:

usb 4-1: new full speed USB device using uhci_hcd and address 77
usb 4-1: device descriptor read/64, error -71
usb 4-1: device descriptor read/64, error -71
usb 4-1: new full speed USB device using uhci_hcd and address 78
usb 4-1: device descriptor read/64, error -71
usb 4-1: device descriptor read/64, error -71
usb 4-1: new full speed USB device using uhci_hcd and address 79
usb 4-1: device not accepting address 79, error -71
usb 4-1: new full speed USB device using uhci_hcd and address 80
usb 4-1: device not accepting address 80, error -71
usb 4-1: new full speed USB device using uhci_hcd and address 81
usb 4-1: device descriptor read/64, error -71
usb 4-1: device descriptor read/64, error -71
usb 4-1: new full speed USB device using uhci_hcd and address 82
usb 4-1: device descriptor read/64, error -71
usb 4-1: device descriptor read/64, error -71
usb 4-1: new full speed USB device using uhci_hcd and address 83
usb 4-1: device not accepting address 83, error -71
usb 4-1: new full speed USB device using uhci_hcd and address 84
usb 4-1: device not accepting address 84, error -71

where to look for fix?

thanks
Yuan


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