No answer from the original poster for several months. Closing.
Please re-open if the problem still persists.
** Changed in: hplip (Ubuntu)
Status: Needs Info => Rejected
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HP OfficeJet G85 printing an scaning not working.
https://launchpad.net/bugs/21403
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ubuntu-bugs mailing list
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/HpPrinter