UDB serial port probs - driver or hardware?

Mark Rafn (markr@accoutrements.com)
Mon, 30 Dec 1996 11:38:32 -0800 (PST)

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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?

Thanks!

-- Mark Rafn markr@accoutrements.com

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Maybe reply: Maurice Hilarius: "Re: UDB serial port probs - driver or hardware?"