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List:       linux-ppp
Subject:    Re: modem session behavior
From:       Chris Fowler <cfowler () outpostsentinel ! com>
Date:       2008-04-22 16:18:11
Message-ID: 1208881091.16663.40.camel () shuttle
[Download RAW message or body]

Ah.

We use Comtrol RocketModems.  They have their own UART and own driver.


On Tue, 2008-04-22 at 09:08 -0700, bfc wrote:
> The problem was that sometimes the serial driver wouldn't send the data
> loaded into
> the FIFO.  Conversations with the modem would hang (and chat would
> eventually time
> out) -- or the connection would be made between modems, but I'd get a LCP
> timeout
> error -- from the same cause.
> 
> You may only get bit by this with particular UART hardware -- ours was
> detected
> (correctly) as a 16550A.  You should be able to find out what yours is by
> either
> grep 'serial' from /var/log/messages, or setserial -a /dev/ttyS0.  The
> problem
> did not occur on another machine with a NS16550A detected.
> 
> The problem kernel we had was 2.6.18 (and various minor versions up to
> 2.6.18-89).
> 
> 


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