** Description changed: + Note to SRU Team + ================ + The first proposed fix (1.0.27-1~experimental2ubuntu2) simply added 'Provides: libsane' but I believe that didn't work because of versioned dependencies. + + This second proposal (1.0.27-1~experimental2ubuntu3) adds a transitional + package libsane and will therefore need NEW processing. + Impact ====== 1) The Debian maintainer renamed libsane to libsane1-experimental "to match with the soname". This apparently fixes a Lintian warning, but makes installing 3rd-party plug-ins hard, as they typically depend on "libsane", not on "libsane1". The first try to add a "Provides: libsane" to libsane1 (which created a virtual package) didn't make drivers installable that claim to depend on a minimum version of libsane as virtual packages are ignored in this case. 2) The soname change might be justified by the new version breaking (several? most?) 3rd party plug-ins even if the library version number doesn't indicate any bigger change than any ordinary new version of the library - which might indicate that this phenomenon might be an upstream bug. libsane 1.0.25 in zesty includes libsane.so.1.25 libsane1 1.0.27 in artful includes libsane.so.1.27 It is to note that depending on the manufacturer for many old scanners there won't be new versions of the plug-ins that are recompiled like this. Test Case ========= Visit http://support.epson.net/linux/en/iscan_c.html Download the amd64 deb .tar.gz Unzip it. Install the iscan .deb from the core folder. It won't install before this SRU because it Depends: libsane Regression Potential ==================== The fix here was proposed to the Debian maintainer in July but there's been virtually zero response on it. In the meantime the workaround that was proposed initially has started to result in automatically uninstalling gtk - which makes the system basically useless. It doesn't seem like adding the Provides will make things any worse for third-party drivers but it has a goodme chance of making things better for some. Impossibility of workarounds ============================ Just installing an old version of libsane is impossible as it uninstalls libgtk (which depends on libsane1 which conflicts with libsane) making the system basically useless. Original Bug Report =================== I don't know if that can be prevented in the long run. But both brscan (for my brother scanner) and iscan (for my epson scanners) have been broken by the change from libsane to libsane1. For iscan I have unpackaged the debian package, changed the dependency it contains from libsane to libsane1 and installed the changed package. But even then my epson scanners no more work leaving me without any scanner => Reporting a bug. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: libsane1 1.0.27-1~experimental1ubuntu2 Uname: Linux 4.13.0-041300rc2-lowlatency x86_64 ApportVersion: 2.20.6-0ubuntu4 Architecture: amd64 Date: Sat Jul 29 08:38:15 2017 EcryptfsInUse: Yes SourcePackage: sane-backends UpgradeStatus: No upgrade log present (probably fresh install)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1707352 Title: the change from libsane to libsane1 broke many (all?) 3rd party plug- ins for sane To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1707352/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
