Automatic duplex not working

[maciekish]

Hi, i have a Brother ADS-1600W with automatic duplex. It only scans the first page though. Seems like the source Automatic Document Feeder(left aligned) is default and Automatic Document Feeder(left aligned,Duplex) would be preferred, but it seems there is no way to change this?

All options specific to device `brother4:net1;dev0':
  Mode:
    --mode Black & White|Gray[Error Diffusion]|True Gray|24bit Color[Fast] [24bit Color[Fast]]
        Select the scan mode
    --resolution 100|150|200|300|400|600|1200|2400|4800|9600dpi [200]
        Sets the resolution of the scanned image.
    --source Automatic Document Feeder(left aligned)|Automatic Document Feeder(left aligned,Duplex)|Automatic Document Feeder(centrally aligned)|Automatic Document Feeder(centrally aligned,Duplex) [Automatic Document Feeder(left aligned)]
        Selects the scan source (such as a document-feeder).
    --brightness -50..50% (in steps of 1) [inactive]
        Controls the brightness of the acquired image.
    --contrast -50..50% (in steps of 1) [inactive]
        Controls the contrast of the acquired image.
  Geometry:
    -l 0..211.9mm (in steps of 0.0999908) [0]
        Top-left x position of scan area.
    -t 0..812.8mm (in steps of 0.0999908) [0]
        Top-left y position of scan area.
    -x 0..211.9mm (in steps of 0.0999908) [211.881]
        Width of scan-area.
    -y 0..812.8mm (in steps of 0.0999908) [415.962]
        Height of scan-area.

I "fixed" it temporarily by overriding scantofile.sh with a docker mount to a modified file which scans like this:

scanimage -l 0 -t 0 -x 215 -y 297 --format=pnm --resolution="$2" --batch="$3" --source "Automatic Document Feeder(centrally aligned,Duplex)"

I would suggest adding a SOURCE env variable that allows configuring this without overriding the script like this.

[PhilippMundhenk]

That's good to know. Yes, indeed, initially this was meant for bringing duplex to non-duplex scanners, but the linux server hosting may have benefits for duplex scanners as well. I will leave this ticket open to remember to make this configurable.