Comment 16 for bug 1731459

This bug is serious for me as I use my scanner everyday.

I am under Lubuntu 17.10.

For who like me cannot wait the official patch, can follow how I did solve:

1. get the source not from git but from the official package manager with command:
apt-get source libsane1
it did download and create the directory sane-backends-1.0.27/

2. modify the lines 2075-2077 of file sane-backends-1.0.27/backend/genesys.c into:
  if (dev->model->flags & GENESYS_FLAG_SHADING_REPARK && dev->model->cmd_set->slow_back_home)
    {
      status = dev->model->cmd_set->slow_back_home (dev, dev->model->flags );

3. build the dependencies with command:
 sudo apt-get build-dep libsane1

4. I had to copy the file /usr/share/aclocal/libtool.m4 into sane-backends-1.0.27/m4 as the build process complained it was missing

5. then build the fixed package with command:
  cd sane-backends-1.0.27
  dpkg-buildpackage -rfakeroot -uc -b

6. then install the updated package with command:
  cd ..
  sudo dpkg -i libsane1_1.0.27-1~experimental2ubuntu2.1_amd64.deb

7. I did restart my PC (but I do not know if this is necessary)

8. My simple-scan gui program did output a clean scan!!

reference here: https://askubuntu.com/questions/28372/how-do-i-get-and-modify-the-source-code-of-packages-installed-through-apt-get/28373#28373