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<!-- received="Thu Oct 23 20:08:44 1997 MST" -->
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<!-- sent="Thu, 23 Oct 1997 22:03:56 +0100 (MET)" -->
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<!-- name="becka@rz.uni-duesseldorf.de" -->
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<!-- subject="Re: Mustek 1200SP: Missing Lines" -->
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<!-- id="m0xOUQ8-000BXJC@charon.beck-sw.de" -->
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<!-- inreplyto="344FA3B9.4B7F140A@physik.uni-kassel.de" -->
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<title>sane-devel: Re: Mustek 1200SP: Missing Lines</title>
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<h1>Re: Mustek 1200SP: Missing Lines</h1>
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<a href="mailto:becka@rz.uni-duesseldorf.de"><i>becka@rz.uni-duesseldorf.de</i></a><br>
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<i>Thu, 23 Oct 1997 22:03:56 +0100 (MET)</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#122">[ date ]</a><a href="index.html#122">[ thread ]</a><a href="subject.html#122">[ subject ]</a><a href="author.html#122">[ author ]</a>
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<li> <b>Next message:</b> <a href="0123.html">David Mosberger-Tang: "Re: Relisys?"</a>
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<li> <b>Previous message:</b> <a href="0121.html">Joerg Diederich: "Dark scans with HP ScanJet 3c"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0126.html">David Mosberger-Tang: "Re: Mustek 1200SP: Missing Lines"</a>
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<li> <b>Reply:</b> <a href="0126.html">David Mosberger-Tang: "Re: Mustek 1200SP: Missing Lines"</a>
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</ul>
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<!-- body="start" -->
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<i>> The Mustek 1200SP scanner was shipped with the DTC436E SCSI-Card.</i><br>
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<i>> I was not able to get this card working on my system (Suse Linux 5.0,</i><br>
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<i>> Kernel 2.0.30).</i><br>
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Known problem ... the card is ... *#$?%<br>
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<p>
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However there have recently been some reports that it can be made working<br>
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somehow ...<br>
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<p>
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<i>> The scanner was then found by the Generic SCSI-Module. Everything looked</i><br>
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<i>> fine, but there are some missing lines in the Grey-Mode In Color-Mode </i><br>
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<i>> there are some horizontal stripes.</i><br>
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Yes. This is a known problem we are currently trying to sort out. It occurs<br>
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most visibly at medium resolutions at every SCSI-Buffer boundary.<br>
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<p>
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<i>> These problems are described in sane-mustek, but applying the fixes</i><br>
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<i>> through mustek.conf did not change anything.</i><br>
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Setting the strip-height should affect the frequency of the stripes.<br>
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<p>
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<i>> are still there, but there were more before changing the scsi-cache.</i><br>
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Yep.<br>
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<p>
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<i>> So I guess that Problem is due to a corrupt data-transfer because of a</i><br>
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<i>> timing problem or so.</i><br>
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I do not think so, as it always seems to be at the beginning/end of a <br>
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transferred buffer. So I think the last alignment between the current and the<br>
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next buffer is not quite right. I don't know, if this is a HW problem, or if <br>
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we are doing something wrong.<br>
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<p>
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However the main developer of the Mustek drivers semms to be able to reproduce <br>
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this problems recently, so maybe there is hope ...<br>
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<p>
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<i>> I guess another SCSI-Controller would help, but first of all I am</i><br>
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<i>> interested in getting the scanner work without buying new hardware...</i><br>
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No. You Controller is just fine. However I would recommend hooking the <br>
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scanner to a second card, as it doesn't seem to support disconnect and can <br>
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thus hog the SCSI bus for very long times. You may want to use the strip-<br>
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height option to limit this time a bit ...<br>
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<p>
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Cu,ANdy<br>
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<p>
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<pre>
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--
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Andreas Beck | Email : <<a href="mailto:becka@sunserver1.rz.uni-duesseldorf.de">becka@sunserver1.rz.uni-duesseldorf.de</a>>
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<p>
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<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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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0123.html">David Mosberger-Tang: "Re: Relisys?"</a>
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<li> <b>Previous message:</b> <a href="0121.html">Joerg Diederich: "Dark scans with HP ScanJet 3c"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0126.html">David Mosberger-Tang: "Re: Mustek 1200SP: Missing Lines"</a>
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<li> <b>Reply:</b> <a href="0126.html">David Mosberger-Tang: "Re: Mustek 1200SP: Missing Lines"</a>
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<!-- reply="end" -->
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</ul>
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