Comment 244 for bug 1728012

Hello I'm new to Linux Mint. Can any one help me with getting the scanner of Brother DCP750 to work ?
With much thanks,
Michael

Le 10 juil. 2019 19:35, Benjamin Terweiden <email address hidden> a écrit :

Samsung Xpress M2070
After installing the drivers (sudo sh install.sh)

this fixed it:
cd /usr/lib/x86_64-linux-gnu/sane

sudo ln -s /opt/smfp-common/scanner/lib/libsane-smfp.so.1.0.1
/usr/lib/x86_64-linux-gnu/sane/libsane-smfp.so.1

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https://bugs.launchpad.net/bugs/1728012

Title:
  Many 3rd party scanner drivers are broken by a sane change

Status in sane-backends package in Ubuntu:
  Fix Released
Status in sane-backends source package in Bionic:
  Fix Committed
Status in sane-backends package in Debian:
  Fix Released

Bug description:
  To the sponsor: Please upload to bionic using the attached sane-
  backends_lp1728012_bionic.debdiff.

  [Impact]

   * Starting with Ubuntu 17.10, Ubuntu changed the directory where sane
  dll looks for third party drivers. This configuration effectively
  broke backward compatibility for all existing third-party drivers.

   * A large swath of these third party drivers (most of them) are no
  longer supported by the OEM, so maintaining compatibility is
  important.

   * No open source replacement drivers are currently available, nor
  does the community have the resources to easily replace them.

   * This bug represents a substantial portion of the scanners in use.

  Scanners known to be affected include, but are not limited to:

   - Brother Scanners (all Brother scanners before brscan4)
    - DCP-145C
    - DCP-163C
    - DCP-165C
    - DCP-167C
    - DCP-185C
    - DCP-195C
    - DCP-197C
    - DCP-365CN
    - DCP-373CW
    - DCP-375CW
    - DCP-377CW
    - DCP-383C
    - DCP-385C
    - DCP-387C
    - DCP-395CN
    - DCP-585CW
    - DCP-6690CW
    - DCP-7030
    - DCP-7040
    - DCP-7045N
    - DCP-8070D
    - DCP-8080DN
    - DCP-8085DN
    - DCP-9010CN
    - DCP-9040CN
    - DCP-9042CDN
    - DCP-9045CDN
    - DCP-J125
    - DCP-J315W
    - DCP-J515W
    - DCP-J715W
    - MFC-250C
    - MFC-255CW
    - MFC-257CW
    - MFC-290C
    - MFC-295CN
    - MFC-297C
    - MFC-490CW
    - MFC-495CW
    - MFC-5490CN
    - MFC-5890CN
    - MFC-5895CW
    - MFC-6490CW
    - MFC-6890CDW
    - MFC-7320
    - MFC-7340
    - MFC-7345N
    - MFC-7440N
    - MFC-7450
    - MFC-7840N
    - MFC-7840W
    - MFC-790CW
    - MFC-795CW
    - MFC-8370DN
    - MFC-8380DN
    - MFC-8480DN
    - MFC-8510DN
    - MFC-8680DN
    - MFC-8880DN
    - MFC-8890DW
    - MFC-9010CN
    - MFC-9120CN
    - MFC-9320CW
    - MFC-9440CN
    - MFC-9450CDN
    - MFC-9840CDW
    - MFC-990CW
    - MFC-J220
    - MFC-J265W
    - MFC-J270W
    - MFC-J410
    - MFC-J410W
    - MFC-J415W
    - MFC-J615W
    - MFC-J630W

   - Dell MFP Laser Printer 1135n

   - Epson Scanners
    - All scanners supported by the libsane-epk driver
    - All scanners supported by the iscan driver
    - Epson Perfection V10
    - Epson Perfection V1000
    - Epson WorkForce GT-1500
    - Epson Perfection V33

   - Samsung M2070

   - Xerox Workcentre 3225

   * This was working in the 17.04 release. 18.04 is an LTS release, so
  backporting is warranted for the 18.04 release.

  [Test Case]

   * Following the standard installation procedures for any of the
  affected scanner drivers results in the driver files being installed
  to /usr/lib/sane/, and sane looking for them in /usr/lib/x86_64-linux-
  gnu/sane. When xsane is run, the scanner is not found.

  * Install the libsane1, libsane-common and sane-utils packages from
  bionic-proposed and confirm that it now finds drivers in
  /usr/lib/sane.

  [Regression Potential]

   * The proposed change is based on an upstream commit, and the patch
  is functional and stable in both 19.04 and 19.10. Low regression risk.

  [Other Info]
   * Third party sane drivers in previous version of sane were located under /usr/lib/sane/, however, the current version of sane on Ubuntu only looks for 64 bit drivers under the /usr/lib/x86_64-linux-gnu/sane directory. /usr/lib64 and /usr/lib64/sane are other directories old drivers are known to install files to.

  * The addition of symlinks alone does not appear to fix this issue,
  though it may make the scanner detectable. Changes to udev rules are
  also needed to allow proper communications to the scanners. A
  selection of workarounds, including working (though not ideal) udev
  rules for a number of scanners has been posted to the sane
  troubleshooting guide:
  help.ubuntu.com/community/sane_Troubleshooting#The_symlink_and_udev_tricks

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