View Full Version : [ubuntu] Serial Port Disabled??

September 8th, 2011, 12:08 PM
Are serial ports disabled by default on Ubuntu?

I have never used the serial ports(DB9) on my PC before. Now I wanted to use one for my arduino (http://ubuntuforums.org/www.arduino.cc/en/Main/ArduinoBoardSerialSingleSided3) board but saw that the IDE displays only two ports which are my front USB ports. No mention of the Serial ports at the back of the CPU cabinet.

'When I ran the command
dmesg | grep tty
I got the following output:

[ 0.000000] console [tty0] enabled
[ 0.245992] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 0.246213] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
[ 0.246858] 00:0a: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 0.247093] 00:0b: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
Does anybody have an idea how to get my serial port to work?

September 16th, 2011, 02:16 PM
I'll be going through the same process soon for the same reason (setting up arduino). I found a few links searching the web (although I haven't tried using them yet).

Here is one using a usb->serial adaptor


I don't know if it'll work for you (or me), but it's worth a shot.