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<TITLE>sane-devel: Re: Problem with scan quality using UMAX Astra 1220S</TITLE>
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<H1>Re: Problem with scan quality using UMAX Astra 1220S</H1>
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<STRONG>From:</STRONG> Rod Pike (<A HREF="mailto:rodneyp@utanet.at?Subject=Re:%20Problem%20with%20scan%20quality%20using%20UMAX%20Astra%201220S&In-Reply-To=&lt;20001116211327.A967@utanet.at&gt;"><EM>rodneyp@utanet.at</EM></A>)<BR>
<STRONG>Date:</STRONG> Thu Nov 16 2000 - 15:13:27 PST
<P>
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On Mon, Nov 13, 2000 at 10:44:16PM +0100, Oliver Rauch wrote:
<BR>
<EM>&gt; Rod Pike wrote:
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; &gt; &gt; I have no idea about ide2scsi emulation. I'm not compiling my own kernel here
</EM><BR>
<EM>&gt; &gt; &gt; so it's configured however RH6.2 ships it.
</EM><BR>
<EM>&gt; &gt; &gt;
</EM><BR>
<EM>&gt; &gt; &gt; That's it for the common info between for the two machines.
</EM><BR>
<EM>&gt; &gt; &gt;
</EM><BR>
<EM>&gt; &gt; &gt; The computer that is giving problems is as follows
</EM><BR>
<EM>&gt; &gt; &gt; AMD-K6-2 550 ( 550 MHz )
</EM><BR>
<EM>&gt; &gt; &gt; 128M RAM
</EM><BR>
<EM>&gt; &gt; &gt;
</EM><BR>
<EM>&gt; &gt; &gt; The computer that is giving a cleaner scan is as follows
</EM><BR>
<EM>&gt; &gt; &gt; AMD-K6-2 333 ( 333 MHz )
</EM><BR>
<EM>&gt; &gt; &gt; 64M RAM
</EM><BR>
<EM>&gt; &gt; &gt;
</EM><BR>
<EM>&gt; &gt; I throttled my 550 MHz computer back to a 333 MHz to match my other machine and
</EM><BR>
<EM>&gt; &gt; isolated the scanner on the SCSI buss. I ensured both the scanner and the SCSI
</EM><BR>
<EM>&gt; &gt; interface were the only terminated devices on the buss. I also scanned with
</EM><BR>
<EM>&gt; &gt; two different cables. Still no improvement.
</EM><BR>
<EM>&gt; &gt;
</EM><BR>
<EM>&gt; &gt; Any suggestions on where I can go from here? I think I've ruled out a hardware
</EM><BR>
<EM>&gt; &gt; problem.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; Hi Rod,
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; some ideas:
</EM><BR>
<EM>&gt; 1) did you change the order of the pci devices (swap the scsi controller
</EM><BR>
<EM>&gt; with another pci device?)
</EM><BR>
<P>I'm currently using an ISA interface but I got the same results from a
<BR>
SCSI interface
<BR>
<P><EM>&gt;
</EM><BR>
<EM>&gt; 2) do you use the most recent bios for the 550MHz Mainboard?
</EM><BR>
<P>I'm using the most recent supported BIOS update ( 1007.A for my P5A )
<BR>
there are beta BIOS available but I prefer to stay away from them.
<BR>
<P><EM>&gt;
</EM><BR>
<EM>&gt; 3) Is the voltage of the 550MHz CPU correct?
</EM><BR>
<EM>&gt; Does the mainboard list the Amd K6-2/550 as supported CPU?
</EM><BR>
<P>Yes and yes.
<BR>
<P><EM>&gt;
</EM><BR>
<EM>&gt; Are you able to put the 330MHz CPU into the 550 Mhz Board?
</EM><BR>
<EM>&gt; (Be careful, the my work with different voltage settings)!!
</EM><BR>
<P>I would like to avoid doing this but I used to have the 330 MHz CPU in
<BR>
this motherboard and I believe the scanning behaved the same way.
<BR>
<P>As I can get good scans running TWAIN, I'm doubtful that I have a
<BR>
hardware problem.
<BR>
<P>Are there any ways of tweaking the SCSI driver properties?
<BR>
<P>Cheers,
<BR>
Rod
<BR>
<P><PRE>
--
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