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<!-- name="Kolja Waschk" -->
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<title>sane-devel: mustek: timeout after scan</title>
<h1>mustek: timeout after scan</h1>
<b>Kolja Waschk</b> (<a href="mailto:kawk@Home.Yo.COM"><i>kawk@Home.Yo.COM</i></a>)<br>
<i>19 Jul 97 01:46:43 +0200</i>
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Kolja&gt; environment: linux 2.0.29, sane 0.61, mustek mfs-12000sp<br>
Kolja&gt; (fw 1.02), tekram dc390 scsi w/tekram driver 1.11<br>
<p>
Kolja&gt; 1. After a scan is complete and also most times when <br>
Kolja&gt; 'scanimage' is stopped by ctrl-c, I get a scsi timeout after<br>
Kolja&gt; 10 minutes) in return to the last scsi stop command sent <br>
Kolja&gt; by the mustek backend (in stop_scan()). <br>
<p>
DM&gt; Hmmh, this is the first time I hear of such a problem. Is the<br>
DM&gt; tekram driver relatively new? I know things work fine with the<br>
DM&gt; ncr810 and several other scsi adapters, so I'm inclined to think<br>
DM&gt; that this might be a problem with the SCSI driver.<br>
<p>
DM&gt; Can you try with another controller?<br>
<p>
I have no other one here, and I couldn't make the DTC3181 controller - that<br>
came with my scanner - work with Linux (it's not the one supported by the ncr<br>
driver fix). The Tekram controller is 53C974-based but has an own driver. <br>
<p>
The low-level driver source is poorly documented, I didn't find any hints on<br>
modifying timeout behaviour there. A 10 minute timeout is quite long...<br>
<p>
Anyway, it's now working for me - not perfectly, but at least a delay, long<br>
enough to wait for the scanner having returned the carriage to its home<br>
position, before the stop command is sent, allows normal operation.<br>
<p>
my stop_scan() now looks like this:<br>
<p>
static SANE_Status<br>
stop_scan (Mustek_Scanner *s)<br>
{<br>
sleep( (int)(SANE_UNFIX(s-&gt;val[OPT_TL_Y].w) +<br>
SANE_UNFIX (s-&gt;val[OPT_BR_Y].w)) / 25 + 2 );<br>
<p>
return sanei_scsi_cmd (s-&gt;fd, stop, sizeof (stop), 0, 0);<br>
}<br>
<p>
Aborting the scan while the scanner is in the setup phase (ie. no image data<br>
has been transferred at all) still causes a timeout, and I haven't found the<br>
right place to insert a delay for this problem yet (if a delay can solve it). <br>
<p>
But I can live with it the way it works now.<br>
<p>
bibi,<br>
Kolja<br>
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Kolja Waschk (<a href="mailto:kawk@Home.Yo.COM">kawk@Home.Yo.COM</a>)
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