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<TITLE>sane-devel: Snapscan USB hangs - compression?</TITLE>
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<META NAME="Author" CONTENT="John Coppens (jcoppens@satlink.com)">
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<META NAME="Subject" CONTENT="Snapscan USB hangs - compression?">
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<H1>Snapscan USB hangs - compression?</H1>
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<!-- received="Thu Jun 28 21:52:23 2001" -->
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<!-- subject="Snapscan USB hangs - compression?" -->
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<STRONG>From:</STRONG> John Coppens (<A HREF="mailto:jcoppens@satlink.com?Subject=Re:%20Snapscan%20USB%20hangs%20-%20compression?&In-Reply-To=<200106290452.f5T4qKW20326@panda.mostang.com>"><EM>jcoppens@satlink.com</EM></A>)<BR>
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<STRONG>Date:</STRONG> Thu Jun 28 2001 - 21:56:27 PDT
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<LI><STRONG>Next message:</STRONG> <A HREF="0319.html">Oliver Neukum: "Re: scanjet 5200c usb and red hat 7.1"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0320.html">Steve Underwood: "Re: Snapscan USB hangs - compression?"</A>
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Hello all.
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<BR>
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<P>No one bit the first time around. I still get hangs while transferring
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<BR>
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images from the Snapscan scanner to the computer. A new hint: after
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<BR>
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the hang, I try to rmmod the module 'uhci.o', which normally works,
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<BR>
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then try to re-insmod it, which sometimes works, but at times segfaults
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<BR>
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during initialization, and then cannot be removed.
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<BR>
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<P>I'd really appreciate a suggestion!
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<BR>
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<EM>>
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</EM><BR>
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<EM>> I just recompiled sane/xsane for the 2.4.5 kernel I installed, hoping the
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</EM><BR>
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<EM>> problem would disappear, but no luck.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> When I scan (snapscan 1212U) an image with lots of white (probably
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</EM><BR>
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<EM>> saturated), the transmission to the PC hangs. Lowering contrast, or
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</EM><BR>
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<EM>> even turning the original 90 degrees, solves the problem. I suspect the
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</EM><BR>
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<EM>> image data is compressed when sending though USB. Could there be an
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</EM><BR>
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<EM>> bug in the protocol? Either in the Snapscan firmware, or at the receiving
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</EM><BR>
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<EM>> end?
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> John
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</EM><BR>
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<P><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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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Snapscan%20USB%20hangs%20-%20compression?&In-Reply-To=<200106290452.f5T4qKW20326@panda.mostang.com>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0319.html">Oliver Neukum: "Re: scanjet 5200c usb and red hat 7.1"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0317.html">Dean Neumann: "Re: segmentation fault in xsane-1.0.4 on Solaris 2.6: FIXED"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0320.html">Steve Underwood: "Re: Snapscan USB hangs - compression?"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0320.html">Steve Underwood: "Re: Snapscan USB hangs - compression?"</A>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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