Re: UDB serial port probs - driver or hardware?
Brian E.W. Wood (beww@intac.com)
Mon, 30 Dec 96 16:12:24 -0500
>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?
Hmmm... I am running the serial port on my UDB at 115,200 with no
problems. It
is the 233Mhz. version but I would guess the serial hardware is the same.
This
being the case I would guess that you have either a hardware fault or
that there
is something wrong with the particular RedHat release you are using.
Just my $0.02
beww@intac.com - Brian E.W. Wood: Conserve Bandwidth, use one line sigs
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