[snapscan] Status on Acer 640BU tests

From: Chris Bagwell (cbagwell@sprynet.com)
Date: Fri Nov 03 2000 - 19:59:13 PST

  • Next message: Chris Bagwell: "Re: [snapscan] Core testing group"

    I did some more testing with the latest snapscan drivers on sourceforge
    and my Acer 640BU. Its probably of some interest to any USB user.

    First off, I commited to CVS some minor updates needed to get USB fully
    working under sane-1.0.3. Hopefully, Sebastien will make a snapshot
    soon for easy download.

    Here are some general tips I've found out. For USB support be sure and
    edit the snapscan-usb.h file as soon as possible to enable it.

    cd sane-1.0.3/backend
    [edit snapscan-usb.h]
    touch snapscan.c
    cd ..
    make; make install

    Touching the snapscan.c file is important or else the compiler will not
    know to look at the changes to snapscan-usb.h.

    Next, modify the global snapscan.conf file and REMOVE any reference to
    /dev/scanner. Place a reference to /dev/usbscanner and make sure the
    /dev/usbscanner really exists in your /dev directory (under RedHat I
    made a symbolic link to /dev/usb/scanner0). Its best to remove any
    existance to /dev/scanner from sane config files and/or your /dev/
    directory. If you make a link from /dev/scanner to your usb device then
    things like xscanimage will always lock up since most of sane treats
    /dev/scanner like a scsi device without seeing if it really is first.

    Lastly, DO NOT run scanimage or xscanimage from within the backend
    diretory or you'll be using a snapscan.conf file that will not contain
    your addition of /dev/usbscanner and will fail to scan. Thats just a
    gotcha that kept happening to me.

    Thats about it.

    With the current CVS software I can scan fine at 150, 300 dpi and
    preview modes on my Acer 640BU. 600 dpi will lock up before the scan of
    actual image data begins and not transfer any data. Haven't been able
    to debug it yet but it appears to be different from the bytes_expected
    problem Sebastien has overcome.

    Chris 

    -- 
 Chris Bagwell (mailto:cbagwell@sprynet.com)     |     Dallas, TX
     http://home.sprynet.com/~cbagwell           |         USA

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