sane-project-website/old-archive/1997-12/0016.html

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<title>sane-devel: Umax S-12 troubles (Linux)</title>
<h1>Umax S-12 troubles (Linux)</h1>
<b>Ryan McCowan</b> (<a href="mailto:ryan@oz.cookeville.com"><i>ryan@oz.cookeville.com</i></a>)<br>
<i>Wed, 3 Dec 1997 23:05:20 -0600 (CST)</i>
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First of all, I want to thank all the developers for a great package that<br>
has freed me from the last dying gasps of Windows. I have a problem with<br>
my Umax S-12 and hanging scans. It happens at random times during a scan,<br>
and sometimes not at all - it probably occurs in about a third of all<br>
scans. The scanner will hang, along with the rest of the SCSI bus. The<br>
output of scanimage with SANE_DEBUG_UMAX set to 128 follows:<br>
<p>
snipped....<br>
[umax] reader_process: buffer of 27531 bytes read; 10204824 bytes to go<br>
[umax] get_data_buffer_status<br>
[umax] sane_read: read 2955 bytes<br>
[umax] read_data_block<br>
[umax] scanner ready<br>
[umax] sane_read: read 4096 bytes<br>
[umax] sane_read: read 4096 bytes<br>
[umax] sane_read: read 4096 bytes<br>
[umax] sane_read: read 4096 bytes<br>
[umax] sane_read: read 4096 bytes<br>
[umax] reader_process: buffer of 27531 bytes read; 10177293 bytes to go<br>
[umax] get_data_buffer_status<br>
[umax] sane_read: read 4096 bytes<br>
[umax] sane_read: read 2955 bytes<br>
<p>
It looks like there should be another read_data_block here, but there<br>
isn't. Everything comes to a halt. I kill the scanimage program, but<br>
nothing happens. I usually can try to read something from my Jaz drive and<br>
that will reset the bus and allow scanimage to die and cancel the scan<br>
properly. It's happened in all SANE's since 0.66, including 0.68 and 0.67<br>
with the umax patch. Is this a known problem? I'll be happy to give any<br>
more info you need.<br>
<p>
While I'm at it, i have an xscanimage nitpick dealing with the preview<br>
window. With it open, sliding the resolution slider (for example) gets a<br>
lot slower and it looks like the preview window is being redrawn with each<br>
incremental movement of the resolution slider. Is this necessary? I can<br>
see redrawing for the window sliders since you have to redraw the<br>
rectangle, though. Also - the preview window refuses to close, also since<br>
0.66, but I suspect these might be more GTK's problems rather than SANE's.<br>
<p>
All pertinent info I could think of:<br>
<p>
Pentium 90, 80mb ram<br>
Redhat 4.2, Linux kernel 2.0.32<br>
BusLogic BT-948 SCSI card<br>
sane 0.68, gtk+-971109<br>
<p>
Scanner is reported as:<br>
<p>
Host: scsi0 Channel: 00 Id: 06 Lun: 00<br>
  Vendor: UMAX     Model: UMAX S-12        Rev: V2.0<br>
  Type:   Scanner                          ANSI SCSI revision: 02<br>
 <br>
<p>
Keep up the good work and TIA for any help.<br>
<p>
Ryan<br>
<p>
<p>
----------------------------------------------------------------------------<br>
Ryan McCowan<br>
 ryan@cookeville.com            --&gt; <a href="http://www.cookeville.com/users/ryan">http://www.cookeville.com/users/ryan</a><br>
 rcm4893@tntech.edu                 Linux: The Choice of a GNU Generation.<br>
----------------------------------------------------------------------------<br>
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