sane-project-website/old-archive/2001-06/0280.html

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<H1>USB hangs - compression?</H1>
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<STRONG>From:</STRONG> John Coppens (<A HREF="mailto:jcoppens@satlink.com?Subject=Re:%20USB%20hangs%20-%20compression?&In-Reply-To=&lt;200106261631.f5QGVxW15988@panda.mostang.com&gt;"><EM>jcoppens@satlink.com</EM></A>)<BR>
<STRONG>Date:</STRONG> Tue Jun 26 2001 - 09:35:41 PDT
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Hi...
<BR>
<P>I just recompiled sane/xsane for the 2.4.5 kernel I installed, hoping the
<BR>
problem would disappear, but no luck.
<BR>
<P>When I scan (snapscan 1212U) an image with lots of white (probably
<BR>
saturated), the transmission to the PC hangs. Lowering contrast, or
<BR>
even turning the original 90 degrees, solves the problem. I suspect the
<BR>
image data is compressed when sending though USB. Could there be an
<BR>
bug in the protocol? Either in the Snapscan firmware, or at the receiving
<BR>
end?
<BR>
<P>John
<BR>
<P><PRE>
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