Étienne, Looking at the cups error_log I think you use the usb backend instead of the hp backend. Please attach your /etc/cups/printers.conf file. Can you try again using the hp backend? How to install your printer with the hp backend is described here: https://help.ubuntu.com/community/HpPrinterInstallationAndMaintenanceDapper
Regards, Pascal -- HP OfficeJet G85 printing an scaning not working. https://launchpad.net/bugs/21403 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs