Ubuntu 18.04 LTS Epson scanner Perfection 4490 Photo

[diemkae]

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 at 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 at 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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