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I was investigating further an issue already reported here. The problem is: after having upgraded the hplip driver to 3.16.2, the scanner in my all-in-one printer HP Color LaserJet Pro MFP M277dw does not work any longer (while the printer does). Today I found other oddities that seem specific to hplip rather than to sane, whereby this other post.

I use Ubuntu Linux 14.04 LTS. In all that follows the device is connected and powered-on. The hplip page for that device is here.

Evidences

a. Moving on from the sane community page on Ubuntu, I followed the suggestion to run sudo hp-setup. The answer is

warning: CUPSEXT could not be loaded. Please check HPLIP installation.

b. If run hp-doctor, the welcome message is

error: This distro (i.e ubuntu 14.04) is either deprecated or not yet supported.

This sounds utterly odd to me, because the previous hplip did not dare to complain this far of the very same distro. The complete output of hp-doctor is available from here on Paste Ubuntu.

c. Ever more puzzling, if I open the HP device manager, I am presented with the window

enter image description here

which seems a false statement to me, since the device works as a printer at the very least. If I click on Setup device... I get again the same dialogue window. And CUPS on localhost:631 indeed confirms that the printer is there ready to be found, nice and idle.

Questions

Is there a way to have the commands hp-setup and hp-doctor run smoothly so that I can fix the scanner issue down the line?

If not, how do I downgrade the hplip driver to the previous stable version? Installing 3.16.2 has led to more havoc than joy.

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The solution to your problem with Ubuntu version 14.04: Upgrade to 16.04 http://releases.ubuntu.com/16.04/

  • This is a good recommendation, but maybe not an Answer... – Jeff Schaller Jul 9 '16 at 21:03
  • @jasonryan & sam: I dont understand your reply. XavierStuvw is running and old Ubuntu 14.04. Please explain why it is a bad suggestion to upgrade to 16.04. – hschou Jul 9 '16 at 21:07
  • @Jeff where is the "recommendation" button? – hschou Jul 9 '16 at 21:08
  • "Add a comment" under the question – Jeff Schaller Jul 9 '16 at 21:08
  • I am a bit confused by the answer and comments. Anyhow my preference, for the time being, goes to downgrading hplip rather than upgrading Ubuntu. Thinking abstractly, I see no sound point why a driver should get installed in a OS it is incompatible with. And, if memory serves well, I upgraded hplip following some notification that I trusted to be fool-proof. – XavierStuvw Jul 10 '16 at 16:48

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