On Wed, 18 Jan 2006, Bob Dodds wrote:

> ohci_hcd 0000:00:02.1: wakeup
> usb 2-2: new full speed USB device using ohci_hcd and address 4
> usb 2-2: configuration #1 chosen from 1 choice
> pl2303 2-2:1.0: pl2303 converter detected
> usb 2-2: pl2303 converter now attached to ttyUSB0
> pl2303 2-2:1.1: pl2303 converter detected
> usb 2-2: pl2303 converter now attached to ttyUSB2
> 
> Why both ttyUSB0 and ttyUSB2? Circular symlinking in /sys tree?
> I could not fix that by my /etc/udev/my.rules

I don't know about circular symbolic links.  But the reason you got two 
ttyUSB devices is that the device has two interfaces.  Take a look at 
/proc/bus/usb/devices or the output from "lsusb -v".

Alan Stern



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