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<H1>Re: Acer 640U: is it wrecked?</H1>
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<STRONG>From:</STRONG> Christian Nassau (<A HREF="mailto:nassau@math.uni-frankfurt.de?Subject=Re:%20Acer%20640U:%20is%20it%20wrecked?&In-Reply-To=&lt;200102071018.LAA17754@newton.math.uni-frankfurt.de&gt;"><EM>nassau@math.uni-frankfurt.de</EM></A>)<BR>
<STRONG>Date:</STRONG> Wed Feb 07 2001 - 02:18:49 PST
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Apparently the &quot;measure_transferrate&quot; routine doesn't work
<BR>
with your scanner (or usb firmware?). The problem with this routine
<BR>
is that it uses a vendor specific extension of the scsi-read
<BR>
instruction and there is no documentation about its proper use
<BR>
available. (I'm quite mystified by its behaviour on my Acer
<BR>
Scanprisa 640S)
<BR>
<P>The good thing is that this routine might not be absolutely necessary.
<BR>
You could look into snapscan.c and uncomment the lines (in the
<BR>
routine sane_start)
<BR>
&nbsp;
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;status = measure_transfer_rate(pss);
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;CHECK_STATUS (status, me, &quot;measure_transfer_rate&quot;);
<BR>
<P>At least you should then get a different error (or the same error,
<BR>
but at a different place...)
<BR>
<P>Good luck,
<BR>
<P>Christian
<BR>
<P><P><P><P><P><P><P><PRE>
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