Found a permanent fix for Samsung SCX-4600 and USB3 issue. According to ArchWiki[1] systemd and dbus don't pickup environment variables set in ~/.bashrc. That explains why the .bashrc fix didn't work. So the solution I finally found and went for was number 2 in the list on ArchWiki here[2]
Using nano I edited /etc/systemd/user.conf. I appended this at the bottom of it: DefaultEnvironment=SANE_USB_WORKAROUND=1 Then I rebooted (I don't know how to get systemd to reload /etc/systemd/user.conf with out rebooting) And tah-dah! Simple scan and Xsane now work as normal. [1] https://wiki.archlinux.org/index.php?title=Environment_variables&oldid=518529#Per_user [2] https://wiki.archlinux.org/index.php?title=Systemd/User&oldid=528307#Environment_variables -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to sane-backends in Ubuntu. https://bugs.launchpad.net/bugs/1728012 Title: Many 3rd party scanner drivers are broken by a sane change Status in sane-backends package in Ubuntu: Confirmed Bug description: Many scanners can no more be used since sane has changed something: The 3rd-party plug-in the vendor provides as .deb package will still install. But the scanner is no more recognized. Scanners that are affected are(besides others): - Epson Perfection V10 - Epson Perfection V1000 - Epson WorkForce GT-1500 - Brother MFC-8510DN - Epson Perfection V33 It is to note that the probability that the scanner manufacturers fix things others broke is below 100%. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: libsane1 1.0.27-1~experimental2ubuntu2 Uname: Linux 4.14.0-041400rc5-lowlatency x86_64 ApportVersion: 2.20.7-0ubuntu3.1 Architecture: amd64 Date: Fri Oct 27 12:35:52 2017 EcryptfsInUse: Yes SourcePackage: sane-backends UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1728012/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
