sane-project-website/old-archive/1998-06/0213.html

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<title>sane-devel: System hangs with sane-0.73 (was: Problems with sane &amp; AVA15xx)</title>
<h1>System hangs with sane-0.73 (was: Problems with sane &amp; AVA15xx)</h1>
<b>Bernd Schroeder</b> (<a href="mailto:bernd@aquila.muc.de"><i>bernd@aquila.muc.de</i></a>)<br>
<i>Sun, 28 Jun 1998 01:42:05 +0200</i>
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Hi,<br>
<p>
On Fri, Jun 26, 1998 at 11:15:54AM -0400, Matto Marjanovic wrote:<br>
<i>&gt; </i><br>
<i>&gt; </i><br>
<i>&gt; The kernel panics are troubling....</i><br>
<i>&gt; </i><br>
<i>&gt; Another user who was asking me for advice discovered that his problems </i><br>
<i>&gt;  went away when he commented out the "dll.conf" entries for all but the</i><br>
<i>&gt;  correct backends (i.e. microtek, in his case).</i><br>
<i>&gt; </i><br>
<i>&gt; I suspect that another backend (maybe microtek2?) was not being careful</i><br>
<i>&gt;  enough in its device identification, and harassing his scanner and/or</i><br>
<i>&gt;  scsi bus into a panic.</i><br>
<p>
That's correct. The microtek2 backend that was distributed with sane-0.73<br>
erroneously doesn't check the vendor string and the model code immediately <br>
after the "inquiry" command, and thus executes a "read scanner attributes"<br>
regardless of whether it is actually a scanner that should be handled by <br>
this backend.<br>
<p>
Normally this behaviour should only produce some lines of error messages <br>
meaning something like "invalid command" or "invalid parameter". But<br>
it seems that sometimes it freezes the whole system.<br>
<p>
I am not sure why this happens. But at least I can tell that the problem is<br>
fixed in the next release of sane. The advice for now is, as stated by Matto,<br>
to comment out this backend in the "dll.conf" file.<br>
<p>
Bernd<br>
<p>
<pre>
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Bernd Schroeder 
Email: <a href="mailto:bernd@aquila.muc.de">mailto:bernd@aquila.muc.de</a>
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<ul>
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<li> <b>Next message:</b> <a href="0214.html">Systembetreiber: "Re: Problems with sane &amp; AVA15xx"</a>
<li> <b>Previous message:</b> <a href="0212.html">Oliver Neukum: "Re: Problems with sane &amp; AVA15xx"</a>
<li> <b>In reply to:</b> <a href="0210.html">Matto Marjanovic: "Re: Problems with sane &amp; AVA15xx"</a>
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<li> <b>Next in thread:</b> <a href="0212.html">Oliver Neukum: "Re: Problems with sane &amp; AVA15xx"</a>
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