I bought a USB-to-Serial converter from ETTeam.com and test it with Ubuntu 9.10 (Karmic kernel 2.6.31-18-generic.) I’ve found that it doesn’t show as /dev/ttyUSB0 as other generic USB-to-Serial converter do.
I’ve been googling for the solution for a while and found this bug report: ftdi serial driver broken in linux-image-2.6.31-14-generic (2.6.31-14.48)
It said that the fix is released with linux-kernel 2.6.32-13.18.
So I download a new 2.6.32 kernel package (.deb) from Ubuntu’s kernel-ppa. I installed these package with a command:
sudo dpkg -i *.deb
Now, I can load a ftdi_sio (FTDI Serial Input/Output) driver with a modprobe command. But it doesn’t recognize my device yet. I ran a lsusb command and found that my converter has a different Product ID. (It might be customized by ETTeam.com)
$ lsusb Bus 005 Device 005: ID 0403:e2e6 Future Technology Devices International, Ltd
(0403 = vendor ID, e2e6 = product ID)
To get it work, I have to run the following command:
$ sudo modprobe ftdi_sio vendor=0x0403 product=0xe2e6
Then I replug the converter and it is shown as /dev/ttyUSB0 now!
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nattster 
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Does it work for You? J have similar device, and it’s shown as /dev/ttyUSB0, but it doesn’t work with Sanguino/Arduino software.
lsusb says it is:
Bus 007 Device 008: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Currently, I use Ubuntu 10.04, and think that the bug that I mentioned
in the blog has been fixed.
I think that your device is a “multi-state” USB devices that need some
command from the OS to change its state and start working.
I faced the same problem you’ve said (with my 3G USB modem). But after I
installed the package “usb-modeswitch”, the problems were gone.
sudo apt-get install usb-modeswitch
I don’t know if this is the right fix but please see:
http://manpages.ubuntu.com/manpages/lucid/man1/usb_modeswitch.1.html for
more info.
I will check it, but it can be something different. I have EvB 4.3 board (AVR) with built-in USB-Serial converter with FTDI chip. Many people have problem with FTDI on Linux and say, that its driver is broken. I tried Arduino to program this board, but it doesn’t work. Today I run it on Windows (with Arduino), and have the same problem 🙂 Works only with default loader on Windows…
PS
I don’t speak Thai language, but it must be good blog (I love Linux and programming). I’m student too. Do You recommend visit Thailand?
Sure! Thai food is great! You’ll love it.
YMMD
THANK YOU !
“sudo modprobe ftdi_sio vendor=0x0403 product=0xe2e6” made my day 😉
Remarkable issues here. I am very satisfied to look your article. Thank you so much and I am having a look forward to contact you. Will you please drop me a e-mail?
dmesg:
usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 6-1: Product: ET-USB/RS232 MINI
usb 6-1: Manufacturer: ETT
usb 6-1: SerialNumber: ETT1B5HD
Solution:
modprobe ftdisio
echo “0403 e2e6” > /sys/bus/usb-serial/drivers/ftdisio/new_id
Result:
ftdi_sio 6-1:1.0: FTDI USB Serial Device converter detected
usb 6-1: Detected FT232RL
usb 6-1: FTDI USB Serial Device converter now attached to ttyUSB0