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<!-- received="Fri Oct 31 15:35:58 1997 PST" -->
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<!-- sent="Sat, 1 Nov 1997 00:34:56 +0100" -->
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<!-- name="Wolfgang Jung" -->
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<!-- email="woju@keep.in-berlin.de" -->
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<!-- subject="Re: Mustek 1200SP: Missing Lines" -->
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<!-- inreplyto="m0xRLFw-000BXnC@charon.beck-sw.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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<b>Wolfgang Jung</b> (<a href="mailto:woju@keep.in-berlin.de"><i>woju@keep.in-berlin.de</i></a>)<br>
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<i>Sat, 1 Nov 1997 00:34:56 +0100</i>
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<p>
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<li> <b>Next message:</b> <a href="0174.html">Joachim Woll: "Re: Mustek 1200SP: Missing Lines"</a>
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<li> <b>Previous message:</b> <a href="0172.html">Dirk Schvnberger: "Re: problems with SANE 0.66"</a>
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On Fri, Oct 31, 1997 at 06:53:12PM +0100, <a href="mailto:becka@rz.uni-duesseldorf.de">becka@rz.uni-duesseldorf.de</a> wrote: <br>
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<i>> > -->The DTC436E SCSI-Card is not recognized by the Kernel.</i><br>
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<i>> > <a href="mailto:becka@rz.uni-duesseldorf.de">becka@rz.uni-duesseldorf.de</a> wrote:</i><br>
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<i>> > >Known problem ... the card is ... *#$?%</i><br>
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<i>> > >However there have recently been some reports that it can be made working</i><br>
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<i>> > >somehow ...</i><br>
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<i>> > Would be great. Do you remember where you read these reports?</i><br>
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<i>> Sorry. Did the same mistake as Michael. Thought it was one of these.</i><br>
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<i>> </i><br>
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<i>> > Could be. In my case there are missing lines -sometimes up to 10</i><br>
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<i>> > at a time.</i><br>
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<i>> This is really much ... What FW revision do you have ? What happens when setting</i><br>
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<i>> backtrack=yes ?</i><br>
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<i>> </i><br>
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<i>> > >Setting the strip-height should affect the frequency of the stripes.</i><br>
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<i>> > Yes it does. A smaller value leads to a higher frequency.</i><br>
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<i>> Ah. Seems to prove my guess that it happens at buffer boundaries.</i><br>
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<i>> </i><br>
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<i>> As you seem to loose many lines (I only see small misalignments, a maximum of 1 line</i><br>
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<i>> maybe), you can probably check most easily :</i><br>
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<i>> </i><br>
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<i>> - what happens at different resoultions ? I only see the effect at medium </i><br>
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<i>> resolutions of about 70-150 dpi. Higher resolutions are probably too slow moving</i><br>
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<i>> or the effect it not visible enough and at lower ones, I ususally have no </i><br>
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<i>> or only few boundaries.</i><br>
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<i>> </i><br>
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<i>> - does setting the speed-parameter produce any effect ?</i><br>
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<i>> </i><br>
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<i>> Another thing :</i><br>
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<i>> </i><br>
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<i>> Do you get a lockup (! system hangs, so take care !) when scanning with</i><br>
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<i>> -mode Color -resolution 111 -y 131 with the standard SCSI buffer of 32k ?</i><br>
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<i>> </i><br>
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<i>> > >However the main developer of the Mustek drivers semms to be able to reproduce</i><br>
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<i>> > >this problems recently, so maybe there is hope ...</i><br>
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<i>> > :-)</i><br>
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<i>> Seems we have tough luck with that ... I will have another look sometime,</i><br>
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<i>> but am quite busy ...</i><br>
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<p>
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<p>
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I tried it at several resolutions:<br>
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a) from 75 - 1200 (I have an 1200SP 1.04 )<br>
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b) it always happens at the end of Bufferboundaries(so at the end of each<br>
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READ SCANNED DATA)<br>
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c) the scanner seems to think it did just linesperbuf lines.<br>
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So overall the scanner delivered the amount of lines.<br>
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d) I estimated 16 lines were ""overscanned"".<br>
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<p>
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do the test and tell sane to just scan ONE line/buf and have the switch handy<br>
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if you scan a big areaa :). Mustek does not stop at the end of the<br>
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movable area ...<br>
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<p>
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<pre>
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--
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<p>
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<pre>
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--
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</pre>
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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="0174.html">Joachim Woll: "Re: Mustek 1200SP: Missing Lines"</a>
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<li> <b>Previous message:</b> <a href="0172.html">Dirk Schvnberger: "Re: problems with SANE 0.66"</a>
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