My Epson 4490 scanner works fine using the iscan software from Epson under
16.04.6 (LTS) but cannot now be accessed under 18.04.2 LTS - error message
like: cannot send commands to the scanner. Check scanner status.
When this problem arose, I installed 16.04 as a dual boot on this hardware
(a vintage Dell Tower Dimension 9100, Intel Pentium(R) 4 CPU 3.00GHz CPU, 4
GB RAM, etc.). The 4490 scanner works fine when I boot 16.04, but fails as
described in this thread under 18.04.
18.04 seems to have broken something that the Epson driver/iscan uses.
Maybe it's something in the sane pkg? The version of sane in the 16.04 boot
is :
dmk@lab2:~$ dpkg -l | grep sane
ii libsane:amd64
1.0.25+git20150528-1ubuntu2.16.04.1 amd64 API library for
scanners
ii libsane-common
1.0.25+git20150528-1ubuntu2.16.04.1 all API library for
scanners -- documentation and support files
ii libsane-hpaio:amd64 3.16.3+repack0-1
amd64 HP SANE backend for multi-function peripherals
ii sane-utils
1.0.25+git20150528-1ubuntu2.16.04.1 amd64 API library for
scanners -- utilities
and the version in 18.04 is newer:
dmk@leno:~$ dpkg -l | grep sane
ii libsane-common
1.0.27-1~experimental3ubuntu2 all API library
for scanners -- documentation and support files
ii libsane-hpaio:amd64 3.17.10+repack0-5
amd64 HP SANE backend for multi-function peripherals
ii libsane1:amd64
1.0.27-1~experimental3ubuntu2 amd64 API library
for scanners
ii sane-utils
1.0.27-1~experimental3ubuntu2 amd64 API library
for scanners -- utilities
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