Comment 37 for bug 1731459

Slightly updated patch instructions from above.

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sudo apt-get install dpkg-dev fakeroot

# in Synaptic, Ubuntu Settings >> Repositories, enable "Source code"
apt-get source libsane1

# eyeball first for any error messages
patch sane-backends-1.0.27/backend/genesys.c --dry-run < genesys.c.diff

# if the above was successful
patch sane-backends-1.0.27/backend/genesys.c < genesys.c.diff

sudo apt-get build-dep libsane1
cd sane-backends-1.0.27
./configure
dpkg-buildpackage -rfakeroot -uc -b
cd ..

sudo rm /usr/share/doc/libsane1/changelog.Debian.gz
sudo dpkg -i libsane1_1.0.27-1~experimental3ubuntu2_amd64.deb
# reboot

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Also:

- If any of the steps above fails, examine the entire output carefully line by line for error information about any possible missing packages, e.g. "Check if the 'dpkg-dev' package is installed". Simply use "sudo apt-get install <package>" to install anything that is missing.

- Unless you lock the libsane1 package in apt ("sudo apt-mark hold <package>") and in Synaptic (Synaptic >> Package >> Lock Version), your next automated or manual Ubuntu update might re-install the original, unpatched libsane1 package. Those two package maintenance systems use independent locking mechanisms that are not synchronized.