Comment 7 for bug 1835220

Did the verification using a Brother MFC-240C USB scanner.

Preparations:

* Installed brscan2 (brscan2-0.2.5-1.amd64.deb)
* Installed libusb-0.1-4 (ought to be a dependency of brscan2
  but that's not the case)
* Added myself to the lp group (sudo adduser $USER lp)

focal
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Verified the test case using version 1.0.29-0ubuntu5.2 of libsane, libsane-common and sane-utils from focal-proposed. The scanner was found and I could scan.

bionic
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Verified the test case using version 1.0.27-1~experimental3ubuntu2.4 of libsane1, libsane-common and sane-utils from bionic-proposed. The scanner was found, which is an improvement, but I could not scan.

brscan2 installs files not only in /usr/lib64/sane, but also directly in /usr/lib64, and to be able to scan I had to add one of the symlinks previously used to work around the absence of the proposed fix:

$ ls -l /usr/lib/libbr*
lrwxrwxrwx 1 root root 31 sep 19 02:49 /usr/lib/libbrscandec2.so -> ../lib64/libbrscandec2.so.1.0.0

So in my case this proved to be a fragile solution for bionic. But for drivers which only installs in /usr/lib64/sane it should be a safe solution of a long standing issue.

Conclusion
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Even if the solution isn't sufficient for bionic in my case, it's a step in the right direction, and I would consider the proposed upload verified for both focal and bionic.