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I have a HP Deskjet 720C printer plugged into an Ubuntu 12.04.1 Laptop.

When I plugged the printer for the first time, the system found the right model automatically and everything seemed to be fine. But every time I try to print something, the printing process doesn't finish, the paper stays in the tray half-way, or just about to finish, failing to print the last few lines of a document, and can only be taken out by switching the printer on and off. The printing job shows as interrupted in the printer menu:

enter image description here

Any ideas on what might be happening?

The printer was previously working fine on an old 7.10 computer via a 25 pin parallel connection. Since then -- and I don't know if this related to the printing problem -- I bought a USB cable adapter to plug to the laptop, like the one in the picture:

enter image description here

This is the output of dmesg:

[ 5213.987345] usblp0: USB Bidirectional printer dev 4 if 0 alt 1 proto 2 vid 0x067B 
pid 0x2305
[ 5274.997679] usblp0: removed
[ 5522.007297] usb 1-1.2: reset full-speed USB device number 4 using ehci_hcd
[ 5561.914953] usb 1-1.2: reset full-speed USB device number 4 using ehci_hcd
[ 5681.101749] usb 1-1.2: reset full-speed USB device number 4 using ehci_hcd
[ 5782.969411] usb 1-1.2: reset full-speed USB device number 4 using ehci_hcd

EDIT: I checked the margins, and they are as default as the ones recommended in the answer. I changed the bottom margin slightly, but it always missed the bottom part of the page when doing Print Test Page, at about 2cm to the end of the A4 page.

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I think this problem has nothing to do with the parallel-USB adaptor, so I would rather delete this question and start a new one. –  213441265152351 Oct 15 '12 at 20:03

1 Answer 1

In your browser open CUPS

cups -->administration-->deafault options-->adjustment

Change the values as follows:

Black ink density adjustment.: 2
Top Margin: 10
Bottom Margin: 150
Left Margin: 10
Right Margin: 10
Shift Output Horizontally:160
Shift Output Vertically: 50

I have had similar problem and this worked for HEWLETT-PACKARD-DESKJET-720C on Ubuntu 12.04.

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