Comment 2 for bug 1771525

Also, I just confirmed that although Xsane and other scan programs like Simple Scan and Skanlite detect the scanner (only if it is already plugged in when Kubuntu 18.04 starts), however only Xsane works Ok (except that in this 18.04 version of Kubuntu Xsane program only starts receiving data once the exploration of the document has finished, which makes much slower scanning several documents, as I describe in the Bug #1771520.

Simple Scan and Skanlite detects the EPSON Perfection V39 scanner (if already plugged before starting Kubuntu 18.04 as above said) but don't start scanning.