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<title>sane-devel: horizontal colored stripes while scanning</title>
<h1>horizontal colored stripes while scanning</h1>
<b>Ondrej Popp</b> (<a href="mailto:ondrej@geocities.com"><i>ondrej@geocities.com</i></a>)<br>
<i>Fri, 14 May 1999 13:59:10 +0000</i>
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Hi,<br>
I am having the following problem with my UMAX-1200S scanner,<br>
and have no clue what so ever... At first everything worked fine, but a<br>
while ago I got these bright horizontal colored stripes in my image and<br>
it is quite hard to get rid of them. Sometimes it helps to switch the<br>
scanner off and on but only sometimes. I tried everything, replacing<br>
scsi controllers, synchronous asynchronous mode, allow/disallow<br>
disconnect, replacing cables, enabling/disabling active termination (see<br>
<a href="http://www.chipmunk.nl/astraterminator.html">http://www.chipmunk.nl/astraterminator.html</a>) but nothing seems to make<br>
much difference : sometimes everyting is fine and sometimes there are<br>
these stripes. But lately the problem is getting worse and getting rid<br>
of it is getting harder. Today I also tried to boot win95, and found the<br>
same stipes there too while scanning. So it does not seem to be<br>
sane/umax related... But suddenly this window came up stating that the<br>
profile did not match and that I should do a device setup. So I did this<br>
first with Vista scan and then with Vista Scan 32, and suddenly with<br>
Vista scan 32 the scanner 'kicked' in and the stripes went away. Had to<br>
do a preview a few times but after two previews the stripes are gone.<br>
Rebooting to Linux, revealed that everything is now fine under Linux<br>
too. I dit at least ten previews with the stripes completely gone. I<br>
realy have NO clue...<br>
You can also hear it when the stripes will be there because the scanner<br>
makes this 'rumbling sound' wile scanning. Like its constantly blocked<br>
or disrupted<br>
a bit, it does not sound 'smooth'. <br>
<p>
Turning on the debugging information shows some kind of an i/o error,<br>
<p>
[umax] wait_scanner<br>
[sanei_scsi] scsi_req_enter: entered 0x80c2578<br>
[sanei_scsi] sanei_scsi_req_wait: waiting for 0x80c2578<br>
[sanei_scsi] sanei_scsi.issue: 0x80c2578<br>
[sanei_scsi] sanei_scsi_req_wait: read 36 bytes<br>
[sanei_scsi] sanei_scsi_req_wait: SCSI command complained: Input/output<br>
error<br>
[umax] check condition sense handler<br>
[umax] invalid sense key =&gt; handled as DEVICE BUSY!<br>
[umax] scanner reports Device busy, waiting ...<br>
[sanei_scsi] scsi_req_enter: entered 0x80c2578<br>
[sanei_scsi] sanei_scsi_req_wait: waiting for 0x80c2578<br>
[sanei_scsi] sanei_scsi.issue: 0x80c2578<br>
[sanei_scsi] sanei_scsi_req_wait: read 36 bytes<br>
[sanei_scsi] sanei_scsi_req_wait: SCSI command complained: Input/output<br>
error<br>
[umax] check condition sense handler<br>
[umax] invalid sense key =&gt; handled as DEVICE BUSY!<br>
[sanei_scsi] scsi_req_enter: entered 0x80c2578<br>
[sanei_scsi] sanei_scsi_req_wait: waiting for 0x80c2578<br>
[sanei_scsi] sanei_scsi.issue: 0x80c2578<br>
[sanei_scsi] sanei_scsi_req_wait: read 36 bytes<br>
[sanei_scsi] sanei_scsi_req_wait: SCSI command complained: Input/output<br>
error<br>
[umax] check condition sense handler<br>
<p>
However, now the stripes are gone, the I/O errors still show in the<br>
debug trace. So that does not seem to make much difference either.<br>
<p>
I realy have no clue... can it be that the scanner needs to be<br>
calibrated or anything and this gets messed up from time to time, and<br>
the sane software is not able to fix this? Well for the time being it<br>
seems to be working again :)<br>
<p>
tx for any suggestions,<br>
Ondrej<br>
<p>
<pre>
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<li> <b>Next message:</b> <a href="0136.html">Oliver Rauch: "Re: horizontal colored stripes while scanning"</a>
<li> <b>Previous message:</b> <a href="0134.html">rene.rebe: "Avision back-end"</a>
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<li> <b>Next in thread:</b> <a href="0136.html">Oliver Rauch: "Re: horizontal colored stripes while scanning"</a>
<li> <b>Reply:</b> <a href="0136.html">Oliver Rauch: "Re: horizontal colored stripes while scanning"</a>
<li> <b>Reply:</b> <a href="0137.html">Ondrej Popp: "Re: horizontal colored stripes while scanning"</a>
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