Hello,
I had a similar problem with SuSE 6.2 when I ported a serial communication
program which runs very stable under SuSE 5.3.
What happend: from time to time the serial receiver was locked, that means
no more characters could be received.
The program talks to a SIEMENS S5 plc over its programming device
connector. Sometimes the SIMATIC sends a BREAK, and then the receiver
locks!
Checking your hint, Jean-Marie, I initialized the port manually; but no
success.
It semms to be a bug in the serial driver.
The workaround which I did in my software was closing the port and open it
again.
I believe we should upgrade to a more stable kernel...
On Mon, 3 Jan 2000, Jean-Marie Bussat wrote:
>
> Hello Carlo,
>
> I had a similar problem with SuSE 6.1. I had programs that were
> using the serial port and were working fine with 5.2 and not after
> the upgrade to 6.1.
>
> It seems (this was a little bit hard to find and I'm not sure
> this is the real reason) that the serial port isn't initialized
> properly.
>
> I found that running setserial by hand after being logged as
> root solves the problem (I'm using ttyS0 and I grabed the
> corresponding line from /etc/init.d/serial). T tried to find a
> way to do that automatically a boot time but I didn't succeed.
> While I'm writing this e-mail, I'm wondering about something
> that could be done with Yast - as far as I remember, it seems
> that there is a menu used to configure serial port (Hmm, not
> sure...).
>
> Try to run setserial by hand to check if it is the same problem
> as me.
>
> Hope this helps.
> Regards,
> Jean-Marie
>
to the serial dongle of Carlo's machine I suppose that only the
manufacturer of the dongled software can help him (if there comes no
bugfix of the serial driver).
In the german computer magazine "c't" I read an interview with Alan Cox
where he noted a bug in the basic serial drivers which has been fix; but I
have no idea if that solves this problem.
Regards,
Gerald Emig
[EMAIL PROTECTED]
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