Still on the ugly workaround, while the Epson 4490 scanner keeps working, I further tested with my Brother MFC 1910W printer/scanner, which used to work on zesty. Xsane doesn't see the scanner, it only works as root, that isn't even running sudo xsane, but taking the risk to assign a password to root and running the terminal, su root, giving the newly created password and issuing the xsane command. This is no matter what: I tried to add the relevant lines to the /lib/udev/rules.d/60-libsane.rules file, adding the user to the saned and the scanner groups, thinkering with the /etc/sane.d/dll.conf file, and everything I could possibly think of. Printing works as usual.
Still on the ugly workaround, while the Epson 4490 scanner keeps working, I further tested with my Brother MFC 1910W printer/scanner, which used to work on zesty. Xsane doesn't see the scanner, it only works as root, that isn't even running sudo xsane, but taking the risk to assign a password to root and running the terminal, su root, giving the newly created password and issuing the xsane command. This is no matter what: I tried to add the relevant lines to the /lib/udev/ rules.d/ 60-libsane. rules file, adding the user to the saned and the scanner groups, thinkering with the /etc/sane. d/dll.conf file, and everything I could possibly think of. Printing works as usual.