My printer is installed from USB, but can't print. Someone times, after shutdown the computer, the print is made.
I tryed HPLIP and Sane.
When I use "hp-setup" from terminal, the message is showed:
error: Device busy: hpfax:/usb/Deskjet_4640_series?serial=CN54P6B0Y005Z4 error: Unable to communicate with the device. Please check the device and try again.
Via WiFi, I can install and the print works fine.
Porto Alegre - Brazil