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127 wiersze
6.4 KiB
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<!-- received="Sun Oct 10 01:04:20 1999 PDT" -->
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<!-- sent="Sun, 10 Oct 1999 03:14:40 -0500" -->
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<!-- name="David Crooke" -->
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<!-- email="dave@dcc.vu" -->
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<!-- subject="[Fwd: Stalling and banding problems with Umax Astra 610S in SANE 1.0.1]" -->
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<title>sane-devel: [Fwd: Stalling and banding problems with Umax Astra 610S in SANE 1.0.1]</title>
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<h1>[Fwd: Stalling and banding problems with Umax Astra 610S in SANE 1.0.1]</h1>
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<b>David Crooke</b> (<a href="mailto:dave@dcc.vu"><i>dave@dcc.vu</i></a>)<br>
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<i>Sun, 10 Oct 1999 03:14:40 -0500</i>
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<p>
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<li> <b>Messages sorted by:</b> <a href="date.html#72">[ date ]</a><a href="index.html#72">[ thread ]</a><a href="subject.html#72">[ subject ]</a><a href="author.html#72">[ author ]</a>
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<li> <b>Next message:</b> <a href="0073.html">David Crooke: "[Fwd: Followup - SCSI stalls with Umax Astra 610S / Tekram DC390 / Linux"</a>
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<li> <b>Previous message:</b> <a href="0071.html">Oliver Rauch: "Re: xsane-0.37"</a>
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David Crooke wrote:<br>
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<i>> </i><br>
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<i>> Hey guys, nice toys!</i><br>
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<i>> </i><br>
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<i>> Sorry if this is a known problem, but I couldn't find a "known bugs" list, and</i><br>
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<i>> an archive troll didn't turn up anything quite the same....</i><br>
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<i>> </i><br>
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<i>> Configuration (more details <a href="http://www.dcc.vu/sane/">http://www.dcc.vu/sane/</a>):</i><br>
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<i>> </i><br>
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<i>> Umax Astra 610S Firmware v1.3</i><br>
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<i>> Linux 2.2.5-15 (generic Red Hat 6.0)</i><br>
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<i>> Tekram DC390 PCI SCSI-2</i><br>
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<i>> No other devices on SCSI bus</i><br>
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<i>> tmscsim.o generic driver, default config (8Mb/sec transfer)</i><br>
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<i>> ASUS P2B-F m/board</i><br>
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<i>> Single Intel Pentium-II</i><br>
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<i>> SANE 1.0.1, out of box build (./configure ; make ; make install)</i><br>
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<i>> Using dll.conf set to "umax" with the default umax.conf</i><br>
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<i>> </i><br>
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<i>> I have encountered 2 problems with this setup:</i><br>
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<i>> </i><br>
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<i>> 1. The scanner stalls in the middle of operation</i><br>
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<i>> ------------------------------------------------</i><br>
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<i>> </i><br>
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<i>> The scanner stalls at two points during a preview, and three during a scan. This</i><br>
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<i>> locks up the application (e.g. xscanimage) which fails to respond to events,</i><br>
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<i>> such as X exposes. In all cases, sending a SCSI reset to the stalled scanner</i><br>
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<i>> causes it to proceed without error, and the application recovers cleanly.</i><br>
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<i>> </i><br>
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<i>> In this context, I have been sending resets with this Linux command:</i><br>
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<i>> </i><br>
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<i>> echo "RESET" >/proc/scsi/tmscsim/0</i><br>
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<i>> </i><br>
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<i>> In preview mode, it moves the head back for perhaps 200ms, pauses for 3-4</i><br>
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<i>> seconds, then moves it forward for about 1 sec, then the scanner stalls for the</i><br>
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<i>> first time. After the reset, it proceeds to do the full scan, and returns the</i><br>
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<i>> head home, but appears not to deliver the last data packet back to the</i><br>
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<i>> application, and a second reset is required.</i><br>
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<i>> </i><br>
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<i>> In scan mode, it stalls at the same initial point, then stalls again apparently</i><br>
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<i>> just after the first data block (xscanimage brings up the "Receiving RGB</i><br>
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<i>> data..." green progress bar, which stays at 0), and finally stalls right at the</i><br>
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<i>> end, at the same point as the preview.</i><br>
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<i>> </i><br>
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<i>> The size of a scan does not seem to affect the stall behaviour - I have tried</i><br>
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<i>> scans from 32Kb to over 30Mb. On full width 300dpi scans, the scanner needs to</i><br>
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<i>> pause, back up and resume (rather like a tape streamer) due to the data volume,</i><br>
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<i>> and this works perfectly.</i><br>
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<i>> </i><br>
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<i>> Does anyone have any thoughts? I'd be happy to collect debug output and send it</i><br>
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<i>> to a developer if they like; failing which I'm going to dive into the code and</i><br>
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<i>> kludge in these resets for my own use, in which case I will report on progress.</i><br>
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<i>> </i><br>
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<i>> 2. Image has colour banding</i><br>
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<i>> ---------------------------</i><br>
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<i>> </i><br>
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<i>> The scanned images have a noticeable colour banding across them. The banding</i><br>
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<i>> seems to be periodic, cycling with the number of pixels scanned, and is not</i><br>
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<i>> correlated to the physical image size. The banding seems to have a certain</i><br>
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<i>> colouration about it, e.g. the bands go CMYCMYCMYCMY.... Here is a sample,</i><br>
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<i>> collected with xscanimage, selecting 300 dpi but otherwise using default</i><br>
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<i>> options.</i><br>
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<i>> </i><br>
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<i>> <a href="http://www.dcc.vu/sane/sample.jpg">http://www.dcc.vu/sane/sample.jpg</a></i><br>
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<i>> </i><br>
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<i>> (I didn't want to attach it as it's over 70Kb)</i><br>
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<i>> </i><br>
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<i>> Is this a hardware fault with the scanner, or a software (e.g. gamma) issue? I</i><br>
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<i>> am not in a position to (easily) try the thing under Windows or MacOS. Any</i><br>
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<i>> advice welcome.</i><br>
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<i>> </i><br>
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<i>> 3. Minor thing</i><br>
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<i>> --------------</i><br>
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<i>> </i><br>
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<i>> Minor additional question - is there a way to configure what /dev/ devices SANE</i><br>
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<i>> tries? I have /dev/scanner linked to /dev/sga, and xscanimage always brings up a</i><br>
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<i>> pop-up asking me to choose one of the two. I'd like to just have it use one</i><br>
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<i>> configured.</i><br>
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<i>> </i><br>
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<i>> Best wishes</i><br>
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<i>> Dave</i><br>
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<i>> </i><br>
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<i>> --</i><br>
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<i>> David Crooke, Austin TX, USA. +1 (512) 795 0805</i><br>
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<i>> Bibendo ergo sum.</i><br>
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<p>
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<pre>
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--
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David Crooke, Austin TX, USA. +1 (512) 795 0805
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Bibendo ergo sum.
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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="0073.html">David Crooke: "[Fwd: Followup - SCSI stalls with Umax Astra 610S / Tekram DC390 / Linux"</a>
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<li> <b>Previous message:</b> <a href="0071.html">Oliver Rauch: "Re: xsane-0.37"</a>
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<!-- nextthread="start" -->
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</ul>
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