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<TITLE>sane-devel: SOLVED: 2 scanners scanning at the same time?</TITLE>
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<META NAME="Author" CONTENT="Michaël van Eeden (mieg@waag.org)">
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<META NAME="Subject" CONTENT="SOLVED: 2 scanners scanning at the same time?">
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<H1>SOLVED: 2 scanners scanning at the same time?</H1>
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<!-- received="Sat May 27 08:07:12 2000" -->
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<!-- name="Michaël van Eeden" -->
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<!-- subject="SOLVED: 2 scanners scanning at the same time?" -->
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<STRONG>From:</STRONG> Michaël van Eeden (<A HREF="mailto:mieg@waag.org?Subject=Re:%20SOLVED:%202%20scanners%20scanning%20at%20the%20same%20time?&In-Reply-To=<000001bfc7ed$ec2fdec0$4f87000a@intra.waag.org>"><EM>mieg@waag.org</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sat May 27 2000 - 08:12:07 PDT
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0185.html">Marcel Pol: "Xsane & no devices"</A>
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<UL>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0183.html">Steve Underwood: "Re: Some snapscan feedback"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0179.html">Douglas Gilbert: "Re: 2 scanners scanning at the same time?"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0194.html">Douglas Gilbert: "Re: SOLVED: 2 scanners scanning at the same time?"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0194.html">Douglas Gilbert: "Re: SOLVED: 2 scanners scanning at the same time?"</A>
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<P>
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Douglas Gilbert wrote:
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<BR>
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<EM>> The Linux sg driver prior to lk 2.2.6 couldn't do two or more
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</EM><BR>
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<EM>> things at once (unless the buffer size was 4096 bytes or less).
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</EM><BR>
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<EM>> Can you upgrade your version of Linux?
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</EM><BR>
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<P>Thanks for your help!
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<BR>
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<P>I upgraded to 2.2.14, and the scanners still waited for each other. In the
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<BR>
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mean time, i started to look at the debug output from sane-dll and sane-umax
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<BR>
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while doing a 'scanimage'. I seems to look at the capabilities of both
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<BR>
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scanners before a scan is made. I finally got it to work by setting the
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<BR>
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environment variable SANE_CONFIG_DIR to two different directories for the
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<BR>
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two different scanning sessions. One dir has a umax.conf with only:
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<BR>
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<P> /dev/sg0
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<BR>
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<P>in it, the other dir has a umax.conf with:
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<BR>
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<P> /dev/sg1
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<BR>
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<P>in it. Now it does work! But it seems to me this is a workaround that
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<BR>
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shouldn't be necessary.
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<BR>
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<P>Maybe an idea would be to add an option to scanimage that disables the
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<BR>
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'do_inquiry' to all devices at the start of a scan, or make sure it only
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<BR>
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does it for the device that is being used?
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<BR>
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<P>Anyway: i can live with the workaround. I am sure I wouldn't be able to set
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<BR>
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up a scan-server with several scanners attached to it without SANE, so
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<BR>
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thanks to you all for this great piece of software!
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<BR>
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<P>Michael
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<BR>
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<P><P><PRE>
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--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20SOLVED:%202%20scanners%20scanning%20at%20the%20same%20time?&In-Reply-To=<000001bfc7ed$ec2fdec0$4f87000a@intra.waag.org>">majordomo@mostang.com</A>
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</PRE>
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<P><!-- body="end" -->
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<HR NOSHADE>
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<UL>
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<!-- next="start" -->
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<LI><STRONG>Next message:</STRONG> <A HREF="0185.html">Marcel Pol: "Xsane & no devices"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0183.html">Steve Underwood: "Re: Some snapscan feedback"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0179.html">Douglas Gilbert: "Re: 2 scanners scanning at the same time?"</A>
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<!-- nextthread="start" -->
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0194.html">Douglas Gilbert: "Re: SOLVED: 2 scanners scanning at the same time?"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0194.html">Douglas Gilbert: "Re: SOLVED: 2 scanners scanning at the same time?"</A>
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<SMALL>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Sat May 27 2000 - 08:09:23 PDT</EM>
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