[Gen8, Gen9, Gen10 Q&A, Help & Troubleshooting] b.serengeti:
This is my list of devices after I plug the converter:

# ls -l
total 0
crw------- 1 root root 189, 1 Jul 20 21:57 1-2
crw------- 1 root root 189, 129 Jul 20 22:04 2-1
crw-rw-rw- 1 root root 248, 0 Jul 20 21:57 DspBridge
crw-rw-rw- 1 root root 10, 233 Jul 20 21:57 accel_ctrl
crw-rw-r-- 1 storage 1001 10, 61 Jul 20 21:57 alarm
crw-rw-rw- 1 root root 10, 63 Jul 20 21:57 ashmem
crw-rw-rw- 1 root root 10, 59 Jul 20 21:57 binder
drwxr-xr-x 3 root root 760 Jul 20 21:57 block
crw------- 1 root root 5, 1 Jul 20 21:58 console
crw------- 1 root root 10, 55 Jul 20 21:57 cpu_dma_latency
drwxr-xr-x 4 storage 1000 0 Jul 20 21:57 cpuctl
crw------- 1 root root 10, 60 Jul 20 21:57 device-mapper
crwxrwxrwx 1 root root 10, 241 Jul 20 21:57 dmalloc
crwxr-xr-x 1 root root 230, 0 Jul 20 21:57 dsplink
drwxr-xr-x 4 root root 80 Jul 20 21:57 dvb
crw-rw-rw- 1 root root 29, 0 Jul 20 21:57 fb0
crw-rw-rw- 1 root root 1, 7 Jul 20 21:57 full
crw------- 1 root root 10, 229 Jul 20 21:57 fuse
drwxr-xr-x 2 root root 40 Jul 20 21:57 gadget
drwxr-xr-x 2 root root 60 Jul 20 21:57 graphics
crwxr-xr-x 1 root root 10, 239 Jul 20 21:57 hdmi
crw-rw-rw- 1 root root 247, 0 Jul 20 21:57 hdmitx
crw------- 1 root root 89, 1 Jul 20 21:57 i2c-1
crw------- 1 root root 89, 2 Jul 20 21:57 i2c-2
crw------- 1 root root 89, 3 Jul 20 21:57 i2c-3
drwxr-xr-x 2 root root 340 Jul 20 21:57 input
crw-r----- 1 root root 1, 2 Jul 20 21:57 kmem
crw------- 1 root root 1, 11 Jul 20 21:57 kmsg
drwxr-xr-x 2 root root 100 Jul 20 21:57 log
crw-r----- 1 root root 1, 1 Jul 20 21:57 mem
drwxr-xr-x 2 root root 40 Jul 20 21:57 mtp
crw------- 1 root root 10, 54 Jul 20 21:57 network_latency
crw------- 1 root root 10, 53 Jul 20 21:57 network_throughput
crw-rw-rw- 1 root root 1, 3 Jul 20 21:57 null
crw------- 1 root root 250, 0 Jul 20 21:57 omap-previewer
crw------- 1 root root 249, 0 Jul 20 21:57 omap-resizer
crw-rw-rw- 1 root root 30, 0 Jul 20 21:57 omaplfb
prw-rw-rw- 1 root root 0 Jul 20 21:57 pm_server_in
prw-rw-rw- 1 root root 0 Jul 20 21:57 pm_server_out
crw-rw---- 1 1001 1016 108, 0 Jul 20 21:57 ppp
crw-rw-rw- 1 root root 5, 2 Jul 20 22:28 ptmx
drwxr-xr-x 2 root root 0 Jan 1 1970 pts
crw-rw-rw- 1 root root 251, 0 Jul 20 21:57 pvrsrvkm
crw------- 1 root root 81, 3 Jul 20 21:57 radio0
crw-rw-rw- 1 root root 1, 8 Jul 20 21:57 random
crw------- 1 root root 254, 0 Jul 20 21:57 rtc0
brwxr-xr-x 1 root root 8, 0 Jul 20 21:57 sda
drwxrwxrwt 2 root root 60 Jul 20 21:57 shm
drwxr-xr-x 2 root root 280 Jul 20 21:57 snd
drwxrwxr-x 2 root 3004 200 Jul 20 21:57 socket
crw------- 1 root root 246, 0 Jul 20 21:57 tifm
crw-rw-rw- 1 root root 5, 0 Jul 20 21:57 tty
crw-rw---- 1 root 1000 4, 0 Jul 20 21:57 tty0
crw------- 1 root root 4, 1 Jul 20 21:57 tty1
crw------- 1 root root 4, 10 Jul 20 21:57 tty10
crw------- 1 root root 4, 11 Jul 20 21:57 tty11
crw------- 1 root root 4, 12 Jul 20 21:57 tty12
crw------- 1 root root 4, 13 Jul 20 21:57 tty13
crw------- 1 root root 4, 14 Jul 20 21:57 tty14
crw------- 1 root root 4, 15 Jul 20 21:57 tty15
crw------- 1 root root 4, 16 Jul 20 21:57 tty16
crw------- 1 root root 4, 17 Jul 20 21:57 tty17
crw------- 1 root root 4, 18 Jul 20 21:57 tty18
crw------- 1 root root 4, 19 Jul 20 21:57 tty19
crw------- 1 root root 4, 2 Jul 20 21:57 tty2
crw------- 1 root root 4, 20 Jul 20 21:57 tty20
crw------- 1 root root 4, 21 Jul 20 21:57 tty21
crw------- 1 root root 4, 22 Jul 20 21:57 tty22
crw------- 1 root root 4, 23 Jul 20 21:57 tty23
crw------- 1 root root 4, 24 Jul 20 21:57 tty24
crw------- 1 root root 4, 25 Jul 20 21:57 tty25
crw------- 1 root root 4, 26 Jul 20 21:57 tty26
crw------- 1 root root 4, 27 Jul 20 21:57 tty27
crw------- 1 root root 4, 28 Jul 20 21:57 tty28
crw------- 1 root root 4, 29 Jul 20 21:57 tty29
crw------- 1 root root 4, 3 Jul 20 21:57 tty3
crw------- 1 root root 4, 30 Jul 20 21:57 tty30
crw------- 1 root root 4, 31 Jul 20 21:57 tty31
crw------- 1 root root 4, 32 Jul 20 21:57 tty32
crw------- 1 root root 4, 33 Jul 20 21:57 tty33
crw------- 1 root root 4, 34 Jul 20 21:57 tty34
crw------- 1 root root 4, 35 Jul 20 21:57 tty35
crw------- 1 root root 4, 36 Jul 20 21:57 tty36
crw------- 1 root root 4, 37 Jul 20 21:57 tty37
crw------- 1 root root 4, 38 Jul 20 21:57 tty38
crw------- 1 root root 4, 39 Jul 20 21:57 tty39
crw------- 1 root root 4, 4 Jul 20 21:57 tty4
crw------- 1 root root 4, 40 Jul 20 21:57 tty40
crw------- 1 root root 4, 41 Jul 20 21:57 tty41
crw------- 1 root root 4, 42 Jul 20 21:57 tty42
crw------- 1 root root 4, 43 Jul 20 21:57 tty43
crw------- 1 root root 4, 44 Jul 20 21:57 tty44
crw------- 1 root root 4, 45 Jul 20 21:57 tty45
crw------- 1 root root 4, 46 Jul 20 21:57 tty46
crw------- 1 root root 4, 47 Jul 20 21:57 tty47
crw------- 1 root root 4, 48 Jul 20 21:57 tty48
crw------- 1 root root 4, 49 Jul 20 21:57 tty49
crw------- 1 root root 4, 5 Jul 20 21:57 tty5
crw------- 1 root root 4, 50 Jul 20 21:57 tty50
crw------- 1 root root 4, 51 Jul 20 21:57 tty51
crw------- 1 root root 4, 52 Jul 20 21:57 tty52
crw------- 1 root root 4, 53 Jul 20 21:57 tty53
crw------- 1 root root 4, 54 Jul 20 21:57 tty54
crw------- 1 root root 4, 55 Jul 20 21:57 tty55
crw------- 1 root root 4, 56 Jul 20 21:57 tty56
crw------- 1 root root 4, 57 Jul 20 21:57 tty57
crw------- 1 root root 4, 58 Jul 20 21:57 tty58
crw------- 1 root root 4, 59 Jul 20 21:57 tty59
crw------- 1 root root 4, 6 Jul 20 21:57 tty6
crw------- 1 root root 4, 60 Jul 20 21:57 tty60
crw------- 1 root root 4, 61 Jul 20 21:57 tty61
crw------- 1 root root 4, 62 Jul 20 21:57 tty62
crw------- 1 root root 4, 63 Jul 20 21:57 tty63
crw------- 1 root root 4, 7 Jul 20 21:57 tty7
crw------- 1 root root 4, 8 Jul 20 21:57 tty8
crw------- 1 root root 4, 9 Jul 20 21:57 tty9
crw-rw-rw- 1 1002 1002 4, 64 Jul 20 21:57 ttyS0
crw------- 1 root root 4, 65 Jul 20 21:57 ttyS1
crw-rw-rw- 1 root root 4, 66 Jul 20 21:57 ttyS2
crw-rw---- 1 root 1000 10, 62 Jul 20 21:57 twl4030-madc
crw-rw---- 1 storage 1002 10, 223 Jul 20 21:57 uinput
crw-rw-rw- 1 root root 1, 9 Jul 20 21:58 urandom
crw------- 1 root root 189, 0 Jul 20 21:57 usb1
crw------- 1 root root 189, 128 Jul 20 22:04 usb2
crw------- 1 root root 252, 1 Jul 20 21:57 usbdev1.1_ep00
crw------- 1 root root 252, 0 Jul 20 21:57 usbdev1.1_ep81
crw------- 1 root root 252, 6 Jul 20 21:57 usbdev1.2_ep00
crw------- 1 root root 252, 3 Jul 20 21:57 usbdev1.2_ep02
crw------- 1 root root 252, 5 Jul 20 21:57 usbdev1.2_ep04
crw------- 1 root root 252, 2 Jul 20 21:57 usbdev1.2_ep81
crw------- 1 root root 252, 4 Jul 20 21:57 usbdev1.2_ep83
crw------- 1 root root 252, 8 Jul 20 22:04 usbdev2.1_ep00
crw------- 1 root root 252, 7 Jul 20 22:04 usbdev2.1_ep81
crw------- 1 root root 252, 11 Jul 20 22:04 usbdev2.2_ep00
crw------- 1 root root 252, 10 Jul 20 22:04 usbdev2.2_ep02
crw------- 1 root root 252, 9 Jul 20 22:04 usbdev2.2_ep81
crw------- 1 root root 253, 0 Jul 20 21:57 usbmon0
crw------- 1 root root 253, 1 Jul 20 21:57 usbmon1
crw------- 1 root root 253, 2 Jul 20 22:04 usbmon2
crw------- 1 root root 7, 0 Jul 20 21:57 vcs
crw------- 1 root root 7, 128 Jul 20 21:57 vcsa
crwxrwxrwx 1 root root 81, 0 Jul 20 21:57 video0
crwxrwxrwx 1 root root 81, 1 Jul 20 21:57 video1
crwxrwxrwx 1 root root 81, 2 Jul 20 21:57 video2
crw------- 1 root root 10, 130 Jul 20 21:57 watchdog
crw-rw-rw- 1 root root 1, 5 Jul 20 21:57 zero

the new dev that appear are

2-1

usbdev2.2_*

Unfortunately, all of these have no access rights for non-root users.

# dmesg
.....
usb usb2: usb resume
hub 2-0:1.0: hub_resume
hub 2-0:1.0: port 1: status 0101 change 0001
hub 2-0:1.0: state 7 ports 1 chg 0002 evt 0000
hub 2-0:1.0: port 1, status 0101, change 0000, 12 Mb/s
usb 2-1: new full speed USB device using musb_hdrc and address 2
usb 2-1: ep0 maxpacket = 8
usb 2-1: default language 0x0409
usb 2-1: New USB device found, idVendor=0403, idProduct=6001
usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 2-1: Product: TTL232RG-VREG3V3
usb 2-1: Manufacturer: FTDI
usb 2-1: SerialNumber: FTSM9CPA
usb 2-1: uevent
usb 2-1: usb_probe_device
usb 2-1: configuration #1 chosen from 1 choice
usb 2-1: adding 2-1:1.0 (config #1, interface 0)
usb 2-1:1.0: uevent
drivers/usb/core/inode.c: creating file '002'
hub 2-0:1.0: state 7 ports 1 chg 0000 evt 0002
hub 2-0:1.0: port 1 enable change, status 00000103

# lsusb
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 227d:0a19
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC

This means that the device is properly detected. However, I would expect an assignement to a port in dmesg.

This is what I get on my OpenSuse 11.3 PC:

[ 5092.095250] usb 1-4: reset high speed USB device using ehci_hcd and address 4
[ 6240.088138] usb 1-4: reset high speed USB device using ehci_hcd and address 4
[ 6360.089017] usb 1-4: reset high speed USB device using ehci_hcd and address 4
[ 7368.722185] usb 2-1.4: new full speed USB device using ehci_hcd and address 5
[ 7368.813944] usb 2-1.4: New USB device found, idVendor=0403, idProduct=6001
[ 7368.813947] usb 2-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 7368.813949] usb 2-1.4: Product: TTL232RG-VREG3V3
[ 7368.813951] usb 2-1.4: Manufacturer: FTDI
[ 7368.813953] usb 2-1.4: SerialNumber: FTSM9CPA
[ 7369.246761] usbcore: registered new interface driver usbserial
[ 7369.246794] USB Serial support registered for generic
[ 7369.247018] usbcore: registered new interface driver usbserial_generic
[ 7369.247020] usbserial: USB Serial Driver core
[ 7369.253357] USB Serial support registered for FTDI USB Serial Device
[ 7369.253457] ftdi_sio 2-1.4:1.0: FTDI USB Serial Device converter detected
[ 7369.253503] usb 2-1.4: Detected FT232RL
[ 7369.253505] usb 2-1.4: Number of endpoints 2
[ 7369.253846] usb 2-1.4: Endpoint 1 MaxPacketSize 64
[ 7369.253848] usb 2-1.4: Endpoint 2 MaxPacketSize 64
[ 7369.253849] usb 2-1.4: Setting MaxPacketSize 64
[ 7369.254055] usb 2-1.4: FTDI USB Serial Device converter now attached to ttyUSB0
[ 7369.254067] usbcore: registered new interface driver ftdi_sio
[ 7369.254069] ftdi_sio: v1.5.0:USB FTDI Serial Converters Driver

I tried to cat /dev/tty0 or tty1, ttyS0, ttyS2, 2-1, but no success in obtaining any data.

Is there a way to check to which port the device is connected or to set a configuration file to determine a priori the port?