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[Launchpad Bug Tracker <1245578@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package hplip - 3.15.2-0ubuntu3

---------------
hplip (3.15.2-0ubuntu3) vivid; urgency=low

  * debian/patches/hpscan-deskjet-3520-aio-allow-non-jpeg-scanning.patch:
    Allow non-JPEG scanning on the HP DeskJet 3520 All-in-One and similar
    devices. Thanks to Lubos Dolezel for the patch (LP: #1245578).
 -- Till Kamppeter <till.kamppeter@xxxxxxxxx>   Mon,  2 Mar 2015 17:48:00 +0100

** Changed in: hplip (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1245578

Title:
  cannot disable JPEG compression when scanning (Deskjet 3520 All-in-
  one)

Status in HP Linux Imaging and Printing:
  Confirmed
Status in hplip package in Ubuntu:
  Fix Released

Bug description:
  I've already filed a "question"
  (https://answers.launchpad.net/hplip/+question/238002), but I came to
  the conclusion it's indeed a bug.

  I have a Deskjet 3520 All-in-one and no matter what I do, scans always
  arrive with JPEG artifacts. For example, with hp-scan, when I disable
  compression, I get the following error message:

  "error: Unable to set option compression to value None"

  When running XSane, in the advanced settings menu, I get JPEG as only
  compression option. Manually setting the compression to "none" in the
  drc file has no positive effect either. In any case, scans arrive with
  severe JPEG artifacts.

  Used hplip version is 3.13.10 on Kubuntu 13.10. I've attached the
  output of hp-check.

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