interrupted printing from parallel to USB printer

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http://askubuntu.com – I have a HP Deskjet 720C printer plugged into an Ubuntu 12.04.1 Laptop via one of these 25 pin parallel to USB cable adapters see picture: When I plugged the printer for the first time, it found the right model automatically and everything seemed to be fine. But every time I try to print something, the printing process is interrupted, the paper stays in the tray half-way and can only be taken out by switching the printer on and off. The printing job shows as interrupted in the printer menu: Any ideas on what might be happening? This is the output of dmesg: [ 5213.987345] usblp0: USB Bidirect (HowTos)