OfficeJet 7310 can't print a simple PDF

[cscarfo]

My OfficeJet 7310 stops printing the attached PDF halfway. Half page is printed quickly then it stops forever. The display shows "Printing .." and the web interface says "Printing page 1 ..."

This is the output of ps -aux:
lp 9769 0.1 0.4 116636 28036 ? S 00:08 0:00 /usr/bin/gs -dQUIET -dDEBUG -dPARANOIDSAFER -dNOPAUSE -dBATCH -dNOMEDIAATTRS -sDEVICE=cups -sstdout=%stderr -sOUTPUTFILE=%stdout -c -f -_
lp 9770 0.0 0.0 66140 3468 ? S 00:08 0:00 Officejet-7300-series 22 carlo A9ROGnFq5x 1 document-name=A9ROGnFq5x media=A4 sides=one-sided finishings=3 number-up=1 PageSize=A4 PageRegion=A4 Duplex=None InputSlot=Auto ColorModel=RGB MediaType=Automatic OutputMode=Normal hpInkSet=Standard noOptionDuplex job-uuid=urn:uuid:4d7b5692-3c8e-3d65-6e41-e2c60608cb6d
lp 9771 0.0 0.0 36472 1884 ? Sl 00:08 0:00 hp:/usb/Officejet_7300_series?serial=MY67PR752D04HR 22 carlo A9ROGnFq5x 1 document-name=A9ROGnFq5x media=A4 sides=one-sided finishings=3 number-up=1 PageSize=A4 PageRegion=A4 Duplex=None InputSlot=Auto ColorModel=RGB MediaType=Automatic OutputMode=Normal hpInkSet=Standard noOptionDuplex job-uuid=urn:uuid:4d7b5692-3c8e-3d65-6e41-e2c60608cb6d

This is a OpenSuSE 11.2 X86_64, hplip 3.9.8-3.4.1, ghostscript 8.70-28.1, cups1.3.11-4.1.

Thank you