Ciao,
Se puo' essere utile, è disposibile all'indirizzo
http://hplipopensource.com/hplip-web/index.html una versione ufficiale piu' recente dei drivers per la Tua stampante.
Inoltre, le release note di tale driver riporta:
Release Notes
HPLIP 3.9.6 - This release has the following changes:
Significant Changes
* The new native CUPS driver (HPCUPS) is now the default printer driver. HPCUPS requires CUPS 1.2 or higher and is a complete replacement for HPIJS. For now HPIJS is still included in the tarball and if necessary can co-exist with HPCUPS. HPCUPS provides new paper sizes for borderless and duplex. This means we now have PPDs with exact printable regions for normal, borderless and duplex paper sizes.[..]
Aki.