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Date:      Mon, 16 Oct 1995 14:08:33 +0930 (CST)
From:      Michael Smith <msmith@atrad.adelaide.edu.au>
To:        raoul@cssc-syd.tansu.com.au (Raoul Golan)
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Too many UUCP checksum errors! Help!
Message-ID:  <199510160438.OAA06059@genesis.atrad.adelaide.edu.au>
In-Reply-To: <199510160039.KAA17797@kiwi.cssc-syd.tansu.com.au> from "Raoul Golan" at Oct 16, 95 10:39:18 am

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Raoul Golan stands accused of saying:
> If this is any help, I turned the uucico debugging on, and
> the Debug file was left full of bad checksum messages.  It also 
> listed the data it received at each step, and I found that there
> were bytes missing from the stream... I could tell because
> mail is usually sent as plain text, and I could see that
> with a packet size of 64 around 10 bytes go missing, and
> the next packet header is mistakenly taken to be data.

I'm actually seeing a similar occurrence with a local ISP; they're losing 
characters on both input and output (under both 2.0.5 and 2.1-STABLE)
on 16550 ports.  The short-term fix for them is to disable the fifos 
and run as though they were '450s.  (Set the flags value for the ports to
0x02)

These 550's are on 4-port cards, no IRQ or port conflicts.   The machine is
a little starved for memory, but still generates _no_ console messages
to explain this symptom.  The UARTs are a mix of several different brands,
so I'm not sure that this is a hardware bogon.

> Raoul

-- 
]] Mike Smith, Software Engineer        msmith@atrad.adelaide.edu.au    [[
]] Genesis Software                     genesis@atrad.adelaide.edu.au   [[
]] High-speed data acquisition and                                      [[
]] realtime instrument control          (ph/fax) +61-8-267-3039         [[
]] My car has "demand start" -Terry Lambert  UNIX: live FreeBSD or die! [[



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