Made a quick test, forcing the install of libsane-hpaio_3.17.7+repack0-3_amd64.deb from artful. This makes the package manager complain a little about broken dependencies, but there does not seem to be any fundamental breakage as sane still works.
Unfortunately the issue persists and lineart (black and white) scanning remains badly broken on the 6950 even with the latest libsane-hpaio_3.17.7.
Made a quick test, forcing the install of libsane- hpaio_3. 17.7+repack0- 3_amd64. deb from artful. This makes the package manager complain a little about broken dependencies, but there does not seem to be any fundamental breakage as sane still works.
Unfortunately the issue persists and lineart (black and white) scanning remains badly broken on the 6950 even with the latest libsane- hpaio_3. 17.7.