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<!-- received="Sat Sep 13 19:40:18 1997 MST" -->
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<!-- sent="Sat, 13 Sep 1997 08:22:27 +0200 (CEST)" -->
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<!-- name="Michael Ritzert" -->
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<!-- email="Ritzert@T-Online.de" -->
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<!-- subject="Re: mustek problems in lineart mode" -->
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<!-- id="m0x9czV-000BWAC@charon.beck-sw.de" -->
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<!-- inreplyto="m0x9ZKK-000BWAC@charon.beck-sw.de" -->
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<title>sane-devel: Re: mustek problems in lineart mode</title>
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<h1>Re: mustek problems in lineart mode</h1>
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<b>Michael Ritzert</b> (<a href="mailto:Ritzert@T-Online.de"><i>Ritzert@T-Online.de</i></a>)<br>
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<i>Sat, 13 Sep 1997 08:22:27 +0200 (CEST)</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#182">[ date ]</a><a href="index.html#182">[ thread ]</a><a href="subject.html#182">[ subject ]</a><a href="author.html#182">[ author ]</a>
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<li> <b>Next message:</b> <a href="0183.html">Bernd Seemann: "Re: Dark scans from Astra 600S"</a>
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<li> <b>Previous message:</b> <a href="0181.html">Preston Brown: "Dark scans from Astra 600S"</a>
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<li> <b>In reply to:</b> <a href="0178.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: mustek problems in lineart mode"</a>
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</ul>
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Hi everybody!<br>
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<p>
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On 12-Sep-97 <a href="mailto:becka@sunserver1.rz.uni-duesseldorf.de">becka@sunserver1.rz.uni-duesseldorf.de</a> wrote:<br>
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<p>
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<i>>I have received 4 private replies to that EMail, so it seems to be a common</i><br>
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<i>>problem we should try to track down.</i><br>
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<p>
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I agree. We should keep it here on the list.<br>
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<p>
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<i>>From the information I have received, it looks like it doesn't depend much on</i><br>
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<i>>the SCSI adaptor/subsystem. I have had reports from NCR53c400 and 53c810</i><br>
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<i>>plus some more which didn't tell me the adaptor. Can anyone confirm, that it</i><br>
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<i>>is not an NCR related problem ?</i><br>
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<p>
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Well, I can. I'm running the scanner on an Adaptec AHA-1542CF.<br>
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It's the only device on that host adaptor, so a locked SCSI bus shouldn't be<br>
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the problem.<br>
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For all those in Germany: I have a description of how my scanner is set up on<br>
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my homepage, URL <a href="http://home.t-online.de/home/ritzert">http://home.t-online.de/home/ritzert</a>.<br>
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I will update it today to include a short report on this issue.<br>
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<p>
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<i>>The first idea I had was that maybe something (the scanner) is hogging the </i><br>
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<i>>SCSI bus for too long and resetting fails. However the hang seems to be </i><br>
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<i>>real hard, as my /var partition resides on an IDE HD and should thus be </i><br>
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<i>>able to log, even if the SCSI-Bus hangs. But what I get is :</i><br>
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<i>></i><br>
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<i>>Aug 17 17:15:15 gate kernel: Detected scsi generic sga at scsi0, channel 0, id</i><br>
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<i>>6, lun 0</i><br>
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<i>>Aug 17 17:17:50 gate kernel: Kernel logging (proc) started.</i><br>
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<i>></i><br>
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<i>>I.e. no error messages between opening the device and the crash.</i><br>
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<p>
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This seems to be another common behaviour: There are no log entries in<br>
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/var/log/messages that show that something went wrong.<br>
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<p>
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<p>
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<i>>We should investigate further, as the effect seems to have been introduced </i><br>
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<i>>by SANE. I have not seen such problems with mscan and muscan.</i><br>
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<i>></i><br>
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<i>>Several possibilities for the cause come to my mind :</i><br>
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<i>></i><br>
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<i>>- I will try to use the strip-height option to see, if disconnect times are</i><br>
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<i>> the problem. </i><br>
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<p>
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I've tried this and it works better now: the scanner doesn't hang in<br>
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the middle of the page but at the end of it :-/<br>
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<p>
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<i>>- Moreover it would be nice, if we could check if the problem is reproducible </i><br>
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<i>> for given parameter sets. So if you see such a hang, write down the command </i><br>
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<i>> line (for scanimage) and retry. If it reproducibly hangs, please post the </i><br>
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<i>> parameters, so we can cross-check and maybe find a rounding-error or </i><br>
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<i>> something the like in the code.</i><br>
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<p>
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Could everybody who has a Mustek scanner please try out this command:<br>
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<p>
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scanimage --device mustek:/dev/scanner -l 5 -t 5 -x 190 -y 270 --resolution 200<br>
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--mode Lineart --speed Fastest<br>
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<p>
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This is how I first hit this problem.<br>
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<p>
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Ciao, Michael<br>
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<pre>
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---
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_
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|\/|_) -=><a href="mailto:Ritzert@T-Online.de">Ritzert@T-Online.de</a> <=-
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| | \ *Michael Ritzert* - <a href="http://home.t-online.de/home/ritzert">http://home.t-online.de/home/ritzert</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.azstarnet.com/~axplinux/sane/">http://www.azstarnet.com/~axplinux/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="0183.html">Bernd Seemann: "Re: Dark scans from Astra 600S"</a>
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<li> <b>Previous message:</b> <a href="0181.html">Preston Brown: "Dark scans from Astra 600S"</a>
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<li> <b>In reply to:</b> <a href="0178.html">becka@sunserver1.rz.uni-duesseldorf.de: "Re: mustek problems in lineart mode"</a>
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<!-- nextthread="start" -->
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</ul>
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