LinuxQuestions.org - serial port configuration problem

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serial port configuration problem

Hi:

I have a minilinux that I being working on, the problem now is that the serial ports doesn’t seem to work (I have 4 serial ports).They don’t write or read.

I run the command setserial –g /dev/ttySx and it says that his IRQ are 3 or 4 (3 for ttyS0 and ttyS2 , 4 for ttyS1 and ttyS4)…but when I run the command: dmesg | grep ttyS the IRQ’s are 0 for ALL my serial ports… could be this the reason why my serial ports aren’t working right??? And if it is how can I solve the problem???

Hope someone could help me.

Greetings

Hi,

First we must know how things are doing right the hardware level. Please post here the output of following command:

Code:

--# /sbin/lspci -v

Well I alredy solve the problem, but now another arise... how can I set the baud rate of my serial port??? Because when I set it to a 1200 the jumper setting changes and I need to stay with the previous configuration of the jumper.