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98 wiersze
4.9 KiB
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<!-- received="Thu Dec 31 04:47:51 1998 PST" -->
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<!-- sent="Thu, 31 Dec 1998 13:10:55 +0100" -->
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<!-- name="Robert Brink" -->
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<!-- email="linux4me@dds.nl" -->
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<!-- subject="Very slow colour scanning with Trust Imagery 1200SP (= Mustek MSF-06000SP)" -->
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<!-- id="98123113463000.00136@petteflet" -->
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<!-- inreplyto="" -->
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<title>sane-devel: Very slow colour scanning with Trust Imagery 1200SP (= Mustek MSF-06000SP)</title>
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<h1>Very slow colour scanning with Trust Imagery 1200SP (= Mustek MSF-06000SP)</h1>
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<b>Robert Brink</b> (<a href="mailto:linux4me@dds.nl"><i>linux4me@dds.nl</i></a>)<br>
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<i>Thu, 31 Dec 1998 13:10:55 +0100</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#323">[ date ]</a><a href="index.html#323">[ thread ]</a><a href="subject.html#323">[ subject ]</a><a href="author.html#323">[ author ]</a>
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<li> <b>Next message:</b> <a href="0324.html">Darren Marshall: "Primax Colorado Direct 9600 Support?"</a>
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<li> <b>Previous message:</b> <a href="0322.html">Reinhold Bader: "Re: Mustek SE 12000SP"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0330.html">Robert Brink: "Re: Very slow colour scanning with Trust Imagery 1200SP (= Mustek MSF-06000SP)"</a>
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<li> <b>Reply:</b> <a href="0330.html">Robert Brink: "Re: Very slow colour scanning with Trust Imagery 1200SP (= Mustek MSF-06000SP)"</a>
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<!-- reply="end" -->
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</ul>
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<!-- body="start" -->
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After many attempts I finally got my Trust Imagery 1200SP scanner to work with<br>
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SANE and Linux. Because the original SCSI card shipped with the scanner<br>
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(NCR53c400a) didn't work with Linux (kernel lockups after installing the<br>
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driver), I used an Adaptec AVA1505 (ISA SCSI host adapter) instead. Now the<br>
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Windows TWAIN driver doesn't recognize the scanner anymore, but GIMP is a good<br>
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alternative for commercial Windows programs, so that is not a big deal.<br>
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<p>
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Anyway, I noticed the following differences between my Linux configuration<br>
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running SANE (with xscanimage, GIMP and sane-mustek) and Windows running TWAIN:<br>
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<p>
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1. When scanning a colour image, the scanning head moves forward and back all<br>
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the time, although I had not enabled "Force backtracking". All together<br>
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scanning a simple phothograph with 200 dpi takes over 5 minutes, while with<br>
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TWAIN this was a matter of seconds. I enlarged the buffer size in sg.h to<br>
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128kb and recompiled the kernel, but that didn't seem to have effect.<br>
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<p>
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2. When scanning a preview, grayscale or lineart image, speed is the same as<br>
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with TWAIN, although colour previewing has a slight backtracking. So I disabled<br>
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colour previewing :-)<br>
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<p>
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3. CPU load is almost 100%, during scan you can't even move the mouse<br>
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pointer!!! This is probably caused by a bad interaction between the SCSI<br>
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adapter and the scanner, the latter not supporting SCSI disconnect. I could<br>
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replace the ISA card with a PCI card supporting bus-mastering DMA, but then<br>
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again, I have to spend another $50 :-(<br>
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<p>
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4. Gamma correction doesn't work fine, it causes the picture to look<br>
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over-exposed very quickly (with white turning into blue). There may be a<br>
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possibillity I have overlooked, as I don't know whether the scanner has<br>
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built-in NVRAM which keeps downloadable software settings in memory. That would<br>
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definitely impair scanning quality.<br>
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<p>
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This is the hardware information my Linux (2.0.36 kernel) system gave me:<br>
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<p>
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bash$ cat /proc/scsi/scsi<br>
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<other SCSI stuff deleted for clarity :-)><br>
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Host: scsi1 Channel: 00 Id: 00 Lun: 00<br>
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Vendor: MUSTEK Model: MSF-06000SP Rev: 2.10<br>
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Type: Scanner ANSI SCSI revision: 01<br>
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<p>
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bash$ cat /proc/scsi/aha152x/1<br>
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Adaptec 152x SCSI driver; $Revision: 1.18 $<br>
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ioports 0x0340 to 0x035f<br>
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interrupt 0x09<br>
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disconnection/reconnection disabled<br>
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parity checking enabled<br>
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synchronous transfers disabled<br>
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0 commands currently queued<br>
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enabled debugging options: (abort) (reset)<br>
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<p>
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Anyone knows what I might have configured wrong? Or is it just a buggy firmware<br>
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revision?<br>
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<p>
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TIA and a happy new year :-)<br>
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<p>
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Robert Brink<br>
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<a href="mailto:linux4me@dds.nl">linux4me@dds.nl</a><br>
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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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To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</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="0324.html">Darren Marshall: "Primax Colorado Direct 9600 Support?"</a>
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<li> <b>Previous message:</b> <a href="0322.html">Reinhold Bader: "Re: Mustek SE 12000SP"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0330.html">Robert Brink: "Re: Very slow colour scanning with Trust Imagery 1200SP (= Mustek MSF-06000SP)"</a>
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<li> <b>Reply:</b> <a href="0330.html">Robert Brink: "Re: Very slow colour scanning with Trust Imagery 1200SP (= Mustek MSF-06000SP)"</a>
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<!-- reply="end" -->
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</ul>
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