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<TITLE>sane-devel: Microtek backend crashing</TITLE>
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<META NAME="Author" CONTENT="Warren Young (tangent@cyberport.com)">
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<META NAME="Subject" CONTENT="Microtek backend crashing">
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<H1>Microtek backend crashing</H1>
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<STRONG>From:</STRONG> Warren Young (<A HREF="mailto:tangent@cyberport.com?Subject=Re:%20Microtek%20backend%20crashing&In-Reply-To=<3999F3EF.8863C5FF@cyberport.com>"><EM>tangent@cyberport.com</EM></A>)<BR>
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<STRONG>Date:</STRONG> Tue Aug 15 2000 - 18:52:47 PDT
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<LI><STRONG>Next message:</STRONG> <A HREF="0143.html">Jochen Eisinger: "Re: bug in mustek_pp"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0141.html">Douglas Hardison: "Re: bug in mustek_pp"</A>
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<HR NOSHADE><P>
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My Microtek backend (for a Scanmaker E6) keeps crashing, and has for a
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<BR>
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long time. It's been a long time because I rarely use the scanner. For
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the same reason, I can't pinpoint when it started failing.
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<BR>
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<P>Here's the GDB backtrace of a simple "scanimage" command:
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<BR>
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<P>...bla...bla...bla...
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<BR>
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<P>Reading symbols from /usr/local/lib/sane/libsane-net.so.1...done.
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<BR>
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Reading symbols from /lib/libnss_files.so.2...done.
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<BR>
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#0 0x40207ed6 in sort_values (result=0xbfff7178, scanline=0xbfff7218,
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<BR>
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pix=0)
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<BR>
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at microtek.c:2147
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<BR>
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2147 for (i=0; i<STRIPS; i++) result[i] = (scanline[i])[pix];
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<BR>
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(gdb) bt
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<BR>
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#0 0x40207ed6 in sort_values (result=0xbfff7178, scanline=0xbfff7218,
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<BR>
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pix=0)
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<BR>
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at microtek.c:2147
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<BR>
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#1 0x40207f68 in calc_calibration (caldata=0x805f618 "",
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scanline=0xbfff7218,
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<BR>
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pixels=5110) at microtek.c:2177
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<BR>
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#2 0x40208359 in do_real_calibrate (s=0x805a7a0) at microtek.c:2276
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<BR>
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#3 0x40208696 in finagle_precal (handle=0x805a7a0) at microtek.c:2387
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<BR>
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#4 0x4020b5d4 in sane_start_guts (handle=0x805a7a0) at microtek.c:3688
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<BR>
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#5 0x4020bc0a in sane_microtek_start (handle=0x805a7a0) at
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<BR>
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microtek.c:3853
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<BR>
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#6 0x400177aa in sane_dll_start (handle=0x805ef20) at dll.c:824
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<BR>
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#7 0x40017a0e in sane_start (h=0x805ef20) at dll-s.c:46
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<BR>
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#8 0x804a1d2 in scan_it () at scanimage.c:795
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#9 0x804b6a4 in main (argc=1, argv=0xbffff894) at scanimage.c:1458
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<P>It's a memory access problem. "print i" says 2, "print pix" says 0, but
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<BR>
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"print scanline[i][pix]" says "Cannot access memory at address 0x17".
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<BR>
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(scanline[i] == 0x17)
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<BR>
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<P>System vital stats:
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<BR>
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<P>Linux 2.2.16 SMP (2 Celeron processors, not overclocked)
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<BR>
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Scanner attached to an Adaptec AHA-2930U2
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<BR>
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SANE 1.0.3 built from source, default configure settings
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<BR>
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Problem happens with scanimage, xscanimage and xsane
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<BR>
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Another scanner (a film scanner not compatible with SANE) on the same
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SCSI bus is working just fine.
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<BR>
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<P>I can hear the scanner's lamp mechanism move just a bit right before the
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<BR>
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crash. Just a little bump, then it returns home.
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<BR>
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<P>I don't have any way of testing it under Windows, as this is a
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<BR>
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Linux-only machine, and I don't wanna move the scanner to another
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<BR>
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machine. If it comes down to it I guess I can, but it'd be a last
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resort.
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<BR>
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<P>Clues anyone?
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<BR>
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<PRE>
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--
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= Warren -- ICBM Address: 36.8274040 N, 108.0204086 W, alt. 1714m
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<P>--
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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:%20Microtek%20backend%20crashing&In-Reply-To=<3999F3EF.8863C5FF@cyberport.com>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0143.html">Jochen Eisinger: "Re: bug in mustek_pp"</A>
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: <EM>Tue Aug 15 2000 - 18:52:53 PDT</EM>
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