[sane-devel] Using "scanimage" under Gentoo

[Dr Rainer Woitok]

Bruce and All,

On Tuesday, 2019-12-17 07:07:14 +1000, Bruce Schultz wrote:

> ...
> You could try rebuilding the backends with the following command:
> 
> EGIT_OVERRIDE_COMMIT_SANE_PROJECT_BACKENDS=6b7052c4 ACCEPT_KEYWORDS="**" 
> emerge -av1 =media-gfx/sane-backends-9999
> 
> That will install git commit 6b7052c4, which should get you pretty close 
> to the same version of the backend that you originally reported working 
> on Ubuntu, which was version 1.0.28+git20190831-xenial0 from the PPA.

Doesn't work either.   But that is  again 1.0.28,  a version  I possibly
missed by hair's breadth [1]:

   $ scanimage -V
   scanimage (sane-backends) 1.0.28-348-g6b7052c4-dirty; backend version 1.0.28
   $ scanimage '--batch=.%03d0.png' --batch-increment 1 --batch-print --batch-start 1 --device pixma:MX880_new-host --source 'Automatic Document Feeder' --format png --mode Color --resolution 300 -l 3 -t 0 -x 210 -y 297
   Scanning infinity pages, incrementing by 1, numbering from 1
   Scanning page 1
   Scanned page 1. (scanner status = 5)
   Scanning page 2
   scanimage: sane_read: Document feeder out of documents
   Scanned page 2. (scanner status = 7)
   Batch terminated, 2 pages scanned
   $

[1]: I've again checked my old Ubuntu installation logs and in particul-
     ar compared them  to the time stamps  of my scanned  "*.pdf" files.
     Under Ubuntu the last multi-page scan  not using the flatbed appar-
     ently was on 2019-08-08.

     I installed sane-backends 0.1.28+git20190810-xenial0  on 2019-08-17
     due to a routine upgrade.  Even though there are some "*.pdf" files
     scanned thereafter, these were flatbed scans.  So I honestly cannot
     tell whether or not this version was able to scan from the ADF und-
     er Ubuntu.   And the sane-backends 1.0.28+git20190831-xenial0 inst-
     alled via just another routine upgrade was possibly never ever used
     at all.

     The version installed when I did my last successful ADF scans under
     Ubuntu then has to be 0.1.27+git20190731-xenial0, which I installed
     on 2019-08-01.

> ...
> In your output below it's showing a timeout of 100, but I presume you 
> intended to override that to 5000.

That's the old story  that my router is advertizing several addresses to
"scanimage" which all but the last  aren't scanners at all.   And every-
time "scanimage"  waits five seconds  for the request to time out.  So I
set the timeout to only 0.1 seconds for all devices EXCEPT my scanner.

Sincerely,
  Rainer