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116 wiersze
5.6 KiB
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<!-- received="Mon Jun 7 07:11:55 1999 PDT" -->
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<!-- sent="Mon, 07 Jun 1999 16:07:24 +0200" -->
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<!-- name="Andreas Rick" -->
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<!-- email="rickand@gemse.fr" -->
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<!-- subject="Re: First version of modified Coolscan backend for the LS-30" -->
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<!-- id="375BD21C.61357FF3@gemse.fr" -->
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<!-- inreplyto="First version of modified Coolscan backend for the LS-30" -->
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<title>sane-devel: Re: First version of modified Coolscan backend for the LS-30</title>
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<h1>Re: First version of modified Coolscan backend for the LS-30</h1>
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<b>Andreas Rick</b> (<a href="mailto:rickand@gemse.fr"><i>rickand@gemse.fr</i></a>)<br>
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<i>Mon, 07 Jun 1999 16:07:24 +0200</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#34">[ date ]</a><a href="index.html#34">[ thread ]</a><a href="subject.html#34">[ subject ]</a><a href="author.html#34">[ author ]</a>
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<li> <b>Next message:</b> <a href="0035.html">Egg Ham: "UMAX 1220S not recognized"</a>
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<li> <b>Previous message:</b> <a href="0033.html">Harald Finster: "Re: microtek x6 and TMA not working"</a>
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<li> <b>Maybe in reply to:</b> <a href="0030.html">Andreas Rick: "First version of modified Coolscan backend for the LS-30"</a>
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<!-- nextthread="start" -->
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</ul>
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<!-- body="start" -->
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Hi Nick <br>
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<p>
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Thanks for your detailed problem description.<br>
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Unfortunately I don't have a quick answer for that<br>
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problem, as I face the same problem myself:<br>
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<p>
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Nick Lamb wrote:<br>
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<i>> </i><br>
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<i>> 1. I downloaded an integrated the drivers with my SANE setup. I built</i><br>
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<i>> the Coolscan stuff static and FTPed it to the scanner machine, which</i><br>
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<i>> is a very minimal Linux install.</i><br>
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<i>> </i><br>
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<i>> 2. I checked find-scanner (looked good so far)</i><br>
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<i>> </i><br>
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<i>> 3. I ran scanimage -L and saw the Coolscan listed (yeah!)</i><br>
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<i>> </i><br>
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<i>> 4. I tried scanimage > example, but it locked up the SCSI on my test</i><br>
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<i>> machine, and I had to switch off the Coolscan. The main drives on</i><br>
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<i>> that machine are SCSI, so this was very scary. I shutdown & restarted</i><br>
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<p>
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If I use the AM53C974 driver I have to reboot cold - I mean it locks<br>
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up my system completely without any chance to recover.<br>
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I only have IDE drives so I am less afraid to lose data on the disk<br>
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but it is extremely anoying anyway.<br>
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<p>
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<i>> </i><br>
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<i>> /* I have a DPT card, using Linux 2.2.6 EATA card drivers. It wouldn't</i><br>
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<i>> let go until I physically switched off the Coolscan :( */</i><br>
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<i>> </i><br>
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<i>> 5. I commented the AutoFocus code out of your driver</i><br>
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<i>> </i><br>
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<i>> 6. I re-built, re-transferred and re-installed</i><br>
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<i>> </i><br>
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<i>> 7. I ran scanimage > example, and this time I got some data!</i><br>
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<i>> </i><br>
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<i>> I'll write a second mail when I've tinkered with some more values and</i><br>
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<i>> taken a look at the code a second time. However, I'm already impressed</i><br>
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<i>> that I actually got DATA out of this first alpha driver.</i><br>
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<p>
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Similar to your experience: <br>
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if I comment out the Autofocus code and use the AM53C974 driver<br>
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everything works fine. (except that the images are completly unsharp).<br>
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I have tried a little bit to figure out where the problem is,<br>
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but it seem to be inside the scsi-driver - not in SANE.<br>
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It is somewhat amazing, as the autofocus command doesn't distinguish<br>
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at all from all the other commands I send.<br>
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<p>
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When using the tmscsi-driver everything works fine including autofocus<br>
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for the Coolscan-backend, but the UMAX backend doesn't finish its scanning<br>
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correctly (a problem already reported in the UMAX-FAQ).<br>
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Right now I have to switch SCSI-drivers if I want to switch from<br>
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my UMAX-Flatbed to the Coolscan-Filmscanner.<br>
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<p>
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I was about to say that the AM53C974-driver might have some bug, <br>
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but when I use WINE and the TWAIN interface I can do everything until<br>
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I try to do use the autofocus. (prescan is OK, preview (which includes autofocus)<br>
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will crash). This behaviour is the same for the AM53C974 driver<br>
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and the tmscsi-driver.<br>
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It may be that the scanners answer to the command is somewhat unusual.<br>
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<p>
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There is nothing much I can do at the SANE level as I am pretty<br>
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sure about the command to send (the same that TWAIN sends, the same that<br>
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vuescan sends)- the choices are: <br>
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don't do the autofocus-> image unsharp<br>
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do the autofocus -> system hangs.<br>
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None of the options is acceptable.<br>
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I think I will have to do some differential debugging (between the<br>
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AM53C974 driver and the tmscsi-driver) and as I'm not too experienced<br>
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in kernel-driver debugging this might take a while.<br>
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<p>
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Any suggestions by SCSI-experienced people are very welcome.<br>
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<p>
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Andreas<br>
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<p>
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-------------------------------------------------------------<br>
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Andreas RICK e-mail: <a href="mailto:rickand@gemse.fr">rickand@gemse.fr</a><br>
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-------------------------------------------------------------<br>
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<p>
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<pre>
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--
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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="0035.html">Egg Ham: "UMAX 1220S not recognized"</a>
|
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<li> <b>Previous message:</b> <a href="0033.html">Harald Finster: "Re: microtek x6 and TMA not working"</a>
|
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<li> <b>Maybe in reply to:</b> <a href="0030.html">Andreas Rick: "First version of modified Coolscan backend for the LS-30"</a>
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<!-- nextthread="start" -->
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<!-- reply="end" -->
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</ul>
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