Unable to open USB device

mythyu yu_luck at 163.com
Tue May 30 03:03:43 PDT 2006


i use "lpadmin -p DJ5440 -E -v usb:/dev/usb/lp0  -m HP-DeskJet_5440-hpijs.ppd"
there is the "Unable to open USB device "usb:/dev/usb/lp0": Success" error .The success means the device exists, and the printer is switched
on. Bu i can't lpr it .please tell me why?

And when i use "lpinfo -v". i can find "direct usb://HP/Deskjet%205400%20series?serial=TH58B120MP04JK" so i use it.

like this "lpadmin -p DJ5440 -E -v usb://HP/Deskjet%205400%20series?serial=TH58B120MP04JK -m HP-DeskJet_5440-hpijs.ppd"
that's ok. i can use lpr ,but the project i am changing need "usb:/dev/usb/lp0".
so ,please help me!




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