Comment 242 for bug 1728012

Since I have an old Brother device whose drivers are installed via brscan2, the proposed change (which adds support for drivers located in /usr/lib/sane) doesn't really apply to me. But I worked around that.

The general preparations according to comment #232 are there, and in addition to that I installed the libusb-0.1-4 package. However, I dropped the ldconfig trick to make .so files in /usr/lib64 shared libraries.

Now to the workaround. I added some symlinks to pretend that the driver files are located in /usr/lib and /usr/lib/sane:

$ ls -l /usr/lib/libbr* /usr/lib/sane
lrwxrwxrwx 1 root root 28 jul 3 21:57 /usr/lib/libbrcolm2.so -> ../lib64/libbrcolm2.so.1.0.1
lrwxrwxrwx 1 root root 31 jul 3 21:57 /usr/lib/libbrscandec2.so -> ../lib64/libbrscandec2.so.1.0.0
lrwxrwxrwx 1 root root 13 jul 3 21:57 /usr/lib/sane -> ../lib64/sane

With that setup I first tested scanning with the sane-backends packages in bionic-release. Result (simple-scan):

"No scanners detected"

Then I installed version 1.0.27-1~experimental3ubuntu2.1 of libsane1, libsane-common, and sane-utils from bionic-proposed. After that I could scan using either simple-scan or xsane.