Non, quelques imprimantes HP ne sont pas supportées. Extrait du site du projet HPLIP :
Note: HPLIP is an open source solution for most HP printers and all-in-ones. Some printers, however, are unsupported. The reasons for this may include issues with intellectual property, technical issues, or limited production numbers. Be advised that printers that appear on the unsupported list may never be supported by HPLIP.
[^] # Re: En gros..
Posté par Axone . En réponse au journal Mon imprimante et moi, c'est du bonheur. Évalué à 1.
Note: HPLIP is an open source solution for most HP printers and all-in-ones. Some printers, however, are unsupported. The reasons for this may include issues with intellectual property, technical issues, or limited production numbers. Be advised that printers that appear on the unsupported list may never be supported by HPLIP.
Liste des imprimantes HP NON supportées : http://hplipopensource.com/hplip-web/supported_devices/unsup(...) (la liste paraît importante, ce n'est rien en comparaison des imprimantes supportées).