ADDENDUM to #129: Ah! Success!
I followed the advice of comment #28
(https://bugs.launchpad.net/ubuntu/+source/sane-
backends/+bug/1728012/comments/28), and it works !!!
Did the following:
$ sudo ln -sfr /usr/lib/sane/libsane-epkowa* /usr/lib/x86_64-linux-gnu/sane
Then:
1. Removed the "usb 0x04b8 0x0137" entry I had added to /etc/sane.d/epkowa.conf
2. Added a 55-epson-libsane.rules file to /etc/udev/rules.d/ with the following
text:
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", MODE=="0666"
SUBSYSTEM=="usb_device", MODE=="0666"
ATTRS{manufacturer}=="EPSON", DRIVERS=="usb", SUBSYSTEMS=="usb",
ATTRS{idVendor}=="04b8", ATTRS{idProduct}=="*", MODE="0666"
ATTRS{idVendor}=="04b8", ATTRS{idProduct}=="0137", MODE="0666",
GROUP="scanner", ENV{libsane_matched}="yes"
Finally I unplugged / plugged my scanner and tried:
$ scanimage -L
And got this encouraging answer:
device `epkowa:interpreter:003:011' is a Epson GT-S50 flatbed scanner
Then I started iscan (Image Scan!) and it immediately detected my scanner.
I then could successfully scan a page.
The workaround is thus effective! Thanks to all contributions :-)
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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)
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https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/1728012/+subscriptions
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