I just setup a new machine for dev work (my old one died after 5 yrs of faithful service) I'm having trouble with getting the FTDI USB/Serial interface to work. It seems to be recognized by the kernel, but then immediately disconnects.
Specs of the new box are as follows.
Athlon64 X2 3800+
1 GB Ram
Ubuntu 7.1 "Gutsy Gibbon"
Linux twofer 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007 i686 GNU/Linux
Could the fact that I'm not running the AMD64 optimized dist be the problem?
Here's the applicable contents of /var/log/messages of me plugging in and unplugging it a few times.
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Nov 2 23:51:18 twofer kernel: [ 1516.972000] usb 2-8: new full speed USB device using ohci_hcd and address 4
Nov 2 23:51:18 twofer kernel: [ 1517.196000] usb 2-8: configuration #1 chosen from 1 choice
Nov 2 23:51:18 twofer kernel: [ 1517.288000] usbcore: registered new interface driver usbserial
Nov 2 23:51:18 twofer kernel: [ 1517.292000] /build/buildd/linux-source-2.6.22-2.6.22/drivers/usb/serial/usb-serial.c: USB Serial support registered for generic
Nov 2 23:51:18 twofer kernel: [ 1517.292000] usbcore: registered new interface driver usbserial_generic
Nov 2 23:51:18 twofer kernel: [ 1517.292000] /build/buildd/linux-source-2.6.22-2.6.22/drivers/usb/serial/usb-serial.c: USB Serial Driver core
Nov 2 23:51:18 twofer kernel: [ 1517.300000] /build/buildd/linux-source-2.6.22-2.6.22/drivers/usb/serial/usb-serial.c: USB Serial support registered for FTDI USB Serial Device
Nov 2 23:51:18 twofer kernel: [ 1517.300000] ftdi_sio 2-8:1.0: FTDI USB Serial Device converter detected
Nov 2 23:51:18 twofer kernel: [ 1517.300000] /build/buildd/linux-source-2.6.22-2.6.22/drivers/usb/serial/ftdi_sio.c: Detected FT232RL
Nov 2 23:51:18 twofer kernel: [ 1517.300000] usb 2-8: FTDI USB Serial Device converter now attached to ttyUSB0
Nov 2 23:51:18 twofer kernel: [ 1517.300000] usbcore: registered new interface driver ftdi_sio
Nov 2 23:51:18 twofer kernel: [ 1517.300000] /build/buildd/linux-source-2.6.22-2.6.22/drivers/usb/serial/ftdi_sio.c: v1.4.3:USB FTDI Serial Converters Driver
Nov 2 23:51:19 twofer kernel: [ 1517.424000] usb 2-8: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1
Nov 2 23:51:19 twofer kernel: [ 1517.432000] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
Nov 2 23:51:19 twofer kernel: [ 1517.436000] ftdi_sio 2-8:1.0: device disconnected
Nov 2 23:53:13 twofer kernel: [ 1632.000000] usb 2-8: USB disconnect, address 4
Nov 2 23:53:18 twofer kernel: [ 1636.692000] usb 2-8: new full speed USB device using ohci_hcd and address 5
Nov 2 23:53:18 twofer kernel: [ 1636.916000] usb 2-8: configuration #1 chosen from 1 choice
Nov 2 23:53:18 twofer kernel: [ 1636.920000] ftdi_sio 2-8:1.0: FTDI USB Serial Device converter detected
Nov 2 23:53:18 twofer kernel: [ 1636.920000] /build/buildd/linux-source-2.6.22-2.6.22/drivers/usb/serial/ftdi_sio.c: Detected FT232RL
Nov 2 23:53:18 twofer kernel: [ 1636.920000] usb 2-8: FTDI USB Serial Device converter now attached to ttyUSB0
Nov 2 23:53:22 twofer kernel: [ 1641.388000] usb 2-8: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1
Nov 2 23:53:23 twofer kernel: [ 1641.392000] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
Nov 2 23:53:23 twofer kernel: [ 1641.392000] ftdi_sio 2-8:1.0: device disconnected
Nov 2 23:53:36 twofer kernel: [ 1655.236000] usb 2-8: USB disconnect, address 5
Nov 2 23:53:43 twofer kernel: [ 1661.736000] usb 2-8: new full speed USB device using ohci_hcd and address 6
Nov 2 23:53:43 twofer kernel: [ 1661.960000] usb 2-8: configuration #1 chosen from 1 choice
Nov 2 23:53:43 twofer kernel: [ 1661.964000] ftdi_sio 2-8:1.0: FTDI USB Serial Device converter detected
Nov 2 23:53:43 twofer kernel: [ 1661.964000] /build/buildd/linux-source-2.6.22-2.6.22/drivers/usb/serial/ftdi_sio.c: Detected FT232RL
Nov 2 23:53:43 twofer kernel: [ 1661.964000] usb 2-8: FTDI USB Serial Device converter now attached to ttyUSB0
Nov 2 23:53:44 twofer kernel: [ 1662.608000] usb 2-8: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1
Nov 2 23:53:44 twofer kernel: [ 1662.612000] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
Nov 2 23:53:44 twofer kernel: [ 1662.612000] ftdi_sio 2-8:1.0: device disconnected
Nov 2 23:55:38 twofer kernel: [ 1777.104000] usb 2-8: USB disconnect, address 6
