Serial Com Port Problem ttySx

daveginorge

Hi all

CentOS 5 on a DSEB-DG motherboard

I am having trouble communicating with my APC UPS on /dev/ttyS0.

What I do know:

UPS and cables are ok they work ok on my other server. CentOS on a Intel S3210SH M/B

Comparing the serial ports in the Hardware browser I notice that the Working system (Intel) is listed as such

16500A-compatible Com port
16500A-compatible Com port
16500A-compatible Com port
16500A-compatible Com port

The non working system lists

16500A-compatible Com port
16500A-compatible Com port

The com ports are set in the bios as:

Com1 3F8/IRQ4

Com2 2F8/IRQ3

So I can see why the system does not work.

What I do NOT know:

How can I correct this problem. Do I need to re-install the drivers? if so HOW.

Thanks for taking the time to read this.

Dave

gomer

can you provide the output of the following commands:

grep serial /var/log/dmesg

and

cat /proc/tty/driver/serial

you may need to run both as root.

gomer

Also, your working board uses a SMSC SCH5027D to provide the serial port functionality. Do we know what Chip is on the Asus board?