sane-project-website/old-archive/1998-05/0183.html

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<title>sane-devel: Re: Using NET backend</title>
<h1>Re: Using NET backend</h1>
<b>Matto Marjanovic</b> (<a href="mailto:maddog@mir.com"><i>maddog@mir.com</i></a>)<br>
<i>Fri, 15 May 1998 14:42:23 -0400 (EDT)</i>
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Date: Thu, 14 May 1998 22:58:55 -0700<br>
From: David Mosberger-Tang &lt;<a href="mailto:David.Mosberger@acm.org">David.Mosberger@acm.org</a>&gt;<br>
<p>
<i> &gt;&gt;&gt;&gt;&gt; On Thu, 14 May 1998 09:00:16 -0700, Jeff Freedman &lt;<a href="mailto:jsf@hevanet.com">jsf@hevanet.com</a>&gt; said:</i><br>
<p>
Jeff&gt; I'm trying out the "net" backend of the .72 release with a<br>
Jeff&gt; Microtek E3, Adaptec 2940, and Redhat Linux 5.0. It starts to<br>
Jeff&gt; work (in the "Preview" dialog of xscanimage); but after what<br>
Jeff&gt; seems like one pass, xscanimage freezes up. From then on, the<br>
Jeff&gt; scanner is unusable until I reboot. If I try "scanimage -L",<br>
Jeff&gt; scanimage just hangs until I kill it.<br>
<p>
Jeff&gt; Scanimage works fine if I use the Microtek backend directly.<br>
<p>
...<br>
I'm not saying this is necessarily a bug in the Microtek backend, but<br>
just because it works with scanimage doesn't prove that it's a bug in<br>
the net backend or in saned either. Maybe you can try to use<br>
SANE_DEBUG_NET=128 on the client side and/or "saned -d 128" on the<br>
server side to try to track the problem down?<br>
<p>
<p>
Heh, I've never actually tried 'saned' myself. I'll give it a shot over<br>
the weekend, and see if I can find/fix any bugs.<br>
<p>
As far as resetting things after a hang: I've noticed that typically, when<br>
I do something that hangs the scanner, often the scanner has barfed on some<br>
command and reset itself, leaving another scsi command hanging off the bus.<br>
If I wait some unreasonably long time (~5-10 minutes), the aha152x driver<br>
will time-out and scrap the hanging command, and then I'm free to go and<br>
do it again. Maybe the driver for your 2940 will do the same.<br>
<p>
-matt m.<br>
<p>
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<li> <b>Next message:</b> <a href="0184.html">Brian Schau: "Re: Unresolved symbol ..."</a>
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<li> <b>Maybe in reply to:</b> <a href="0172.html">Jeff Freedman: "Using NET backend"</a>
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<li> <b>Next in thread:</b> <a href="0185.html">Jeff Freedman: "Re: Using NET backend"</a>
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