Re: UDB serial port probs - driver or hardware?

Maurice Hilarius (maurice@ellpspace.math.ualberta.ca)
Tue, 31 Dec 1996 00:01:53 -0700

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Maybe in reply to: Mark Rafn: "UDB serial port probs - driver or hardware?"

At 11:38 AM 12-30-96 -0800, you wrote:
>The serial ports on my UDB (166MHz, redhat 4.0, kernel 2.0.25) don't work
>at speeds faster than 38400. I've seen one or two other comments on this
>list about it, but no definitive description of where the problem lies.
>
>When I try to use a program that sets the serial port to 56Kbps, DTR is
>asserted but no data seems to go over the line. Everything seems to work
>at 38Kbps, but the carrier drops sometimes (~75% of the time) during
>single transfers over about 3MB. The carrier drop problem may be totally
>unrelated, and may even be the fault of my ISP.
>
>Is this a problem with the UDB serial hardware or with the kernel serial.c
>driver? What should I do to collect more information so someone more
>knowledgable can point me in the right direction?
>
Probably the hardware. I guess this, as we am unable to get faster than this
on Digital UNIX or NT on these machines as well.

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Next message: Harald Koenig: "Re: how to upgrade to *.alpha.rpm packages ?"
Previous message: Daniel Gruner: "Re: Problems installing 4.0 on Alpha workstation"
Maybe in reply to: Mark Rafn: "UDB serial port probs - driver or hardware?"