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<H1>Re: epson 1200photo survey + freezing on certain conditions</H1>
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<STRONG>From:</STRONG> <A HREF="mailto:jc254@newton.cam.ac.uk?Subject=Re:%20epson%201200photo%20survey%20%2B%20freezing%20on%20certain%20conditions&In-Reply-To=&lt;200009051043.LAA25294@klein.newton.cam.ac.uk&gt;"><EM>jc254@newton.cam.ac.uk</EM></A><BR>
<STRONG>Date:</STRONG> Sat Sep 02 2000 - 15:46:11 PDT
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[ Resent for Milan -jhnc ]
<BR>
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<BR>
<P>I'm replying to the mailing list, because the details can be interesting
<BR>
for tracking my problem with Epson Perfection 1200 Photo that I describe
<BR>
below.
<BR>
<P><EM>&gt;&gt;&gt;&gt;&gt; &quot;JHNC&quot; == Jonathan H N Chin &lt;<A HREF="mailto:jc254@newton.cam.ac.uk?Subject=Re:%20epson%201200photo%20survey%20%2B%20freezing%20on%20certain%20conditions&In-Reply-To=&lt;200009051043.LAA25294@klein.newton.cam.ac.uk&gt;">jc254@newton.cam.ac.uk</A>&gt; writes:
</EM><BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;JHNC&gt; To anyone who is succesfully using an Epson 1200 Photo
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;JHNC&gt; (including the TPU) under Linux with USB on a &quot;PC&quot;:
<BR>
<P>Well, the scanner mostly works, including TPU.
<BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;JHNC&gt; 1) version of linux kernel 1a) any kernel patches you have
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;JHNC&gt; applied 1b) is it SMP?
<BR>
<P>2.2.17pre6 compiled from Debian 2.2 sources, USB backport
<BR>
usb-2.4.0-test2-pre2-for-2.2.16-v3.diff.gz, ReiserFS patch, no SMP.
<BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;JHNC&gt; 2) version of SANE epson backend 3) version of SANE
<BR>
<P>sane 1.0.3 with the included Epson backend.
<BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;JHNC&gt; 4) version of xsane, if you use it
<BR>
<P>0.61 with a hack not to get the list of devices but to use Epson driver
<BR>
directly. This is because SANE freezes on an attempt to list devices
<BR>
(yes, I'm going to send an xsane patch to Oliver Rauch sometimes).
<BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;JHNC&gt; 5) motherboard model 5a) processor(s) model 5b) if USB is
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;JHNC&gt; not built-in, what additional hardware you use
<BR>
<P>TopGun Pentium board with AMD K6/200, general USB PCI card, UHCI.
<BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;JHNC&gt; 6) any problems you had (USB or SANE related) 6a) and how
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;JHNC&gt; you overcame them
<BR>
<P>I have two problems:
<BR>
<P>1) The insignificant one is `scanimage --help -d epson' freezes after
<BR>
&nbsp;&nbsp;&nbsp;writing out the appropriate information, as well as `sane --list-devices'.
<BR>
&nbsp;&nbsp;&nbsp;I have to switch off/on the scanner. I overcame this by saving the
<BR>
&nbsp;&nbsp;&nbsp;help into a file for future reference, specifying the epson driver
<BR>
&nbsp;&nbsp;&nbsp;to SANE always directly and hacking xsane, the problem doesn't appear
<BR>
&nbsp;&nbsp;&nbsp;anymore. :-)
<BR>
<P>2) The significant one is that in most cases (but not always) scanimage,
<BR>
&nbsp;&nbsp;&nbsp;the driver and the scanner all freeze during scan at higher
<BR>
&nbsp;&nbsp;&nbsp;resolutions. I have to switch off the scanner and reboot my computer
<BR>
&nbsp;&nbsp;&nbsp;(killing scanimage doesn't help, the `scanner' module remains busy)
<BR>
&nbsp;&nbsp;&nbsp;to fix the problem. My current observations of the problem are:
<BR>
<P>&nbsp;&nbsp;&nbsp;- It never happens during 600 dpi (or lower) scans.
<BR>
&nbsp;&nbsp;&nbsp;- It happened once during 1200 dpi scan; it very often happens with
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2400 dpi.
<BR>
&nbsp;&nbsp;&nbsp;- It seems to happen only when using TPU (I tried about 5 scans with
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;flatbed and it never happened).
<BR>
&nbsp;&nbsp;&nbsp;- It seems to happen only when gamma correction is used
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(--gamma-red-table etc.) but I'm not sure about this.
<BR>
&nbsp;&nbsp;&nbsp;- If TPU is used and resolution is 2400 dpi and gamma correction is
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;specified, then:
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;* If it is the very first scan after switching on the scanner, it's
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;very likely to succeed. It has frozen only once, when I had
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;switched off the TPU, but specified it as a source (it switched
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;on automatically and the scan has frozen).
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;* Otherwise it always freezes.
<BR>
&nbsp;&nbsp;&nbsp;- It always freezes at the beginning of the scan, without outputting
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;any image data.
<BR>
<P>&nbsp;&nbsp;&nbsp;Note these observations aren't based on large amount of statistical data.
<BR>
<P>&nbsp;&nbsp;&nbsp;The following information from drivers is available:
<BR>
<P>&nbsp;&nbsp;&nbsp;- SANE report with SANE_DEBUG_EPSON=1:
<BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] error in receive - status = 5
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;scanimage: sane_read: Invalid argument
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] error in receive - status = 5
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] error in receive - status = 5
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;... &lt;many times repeating&gt;
<BR>
<P>&nbsp;&nbsp;&nbsp;- Kernel log:
<BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sep 3 00:02:42 blackbird kernel: usb_control/bulk_msg: timeout
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sep 3 00:02:52 blackbird kernel: usb-uhci.c: interrupt, status 3, frame# 804
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sep 3 00:02:52 blackbird kernel: scanner.c: read_scanner(0): funky result:-32. Please notify the maintainer.
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sep 3 00:02:52 blackbird kernel: scanner.c: read_scanner(0): funky result:-32. Please notify the maintainer.
<BR>
<P>&nbsp;&nbsp;&nbsp;- On the very first scan after switching on the TPU (and using it)
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SANE reports:
<BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] fatal error - Status = 92
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] retrying ESC G - 1
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] fatal error - Status = 92
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] retrying ESC G - 2
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] fatal error - Status = 92
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] retrying ESC G - 3
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] fatal error - Status = 92
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] retrying ESC G - 4
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] fatal error - Status = 92
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[epson] retrying ESC G - 5
<BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;After reporting these messages the performing scan continues
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;happily.
<BR>
<P>&nbsp;&nbsp;&nbsp;I'd appreciate any help, because the vision of rebooting before each
<BR>
&nbsp;&nbsp;&nbsp;high resolution TPU scan isn't much fine. :-(
<BR>
<P>Milan Zamazal
<BR>
<P><PRE>
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Robert J. Chassell
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