I have a USB-RS232 converter with an FTDI FT232R chip (VID:PID=0403:6001) that is detected and mapped to /dev/ttyUSBx on boot of the RPi 3B, but does not map to /dev/ttyUSBx if it is simply plugged in (or unplugged/replugged).
Anyone seen this, or have any idea what to look at to debug? Any hints or help is greatly appreciated.
I've tried adding udev rules based on what I've seen on here and other places on the web, to no avail. No additional udev rules were in place when the information below was captured.
I have done
- apt-get update
- apt-get upgrade
- apt-get dist-upgrade
- rpi-update
- multiple reboots
The info for my system
root@PI-Wiggs1:/home/owner# uname -a
Linux PI-Wiggs1 4.14.73-v7+ #1148 SMP Mon Oct 1 16:57:50 BST 2018 armv7l GNU/Linux
lsusb is the same both before and after the unplug (only shown once here)
root@PI-Wiggs1:/home/owner# lsusb -v
Bus 001 Device 005: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x0403 Future Technology Devices International, Ltd
idProduct 0x6001 FT232 USB-Serial (UART) IC
bcdDevice 6.00
iManufacturer 1 FTDI
iProduct 2 FT232R USB UART
iSerial 3 AI06JVSG
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 90mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 2 FT232R USB UART
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)
dmesg on boot shows USB-serial converter attaching to /dev/ttyUSB0
root@PI-Wiggs1:/home/owner# dmesg
[ 2.081483] usb 1-1.3: new full-speed USB device number 4 using dwc_otg
[ 2.249063] usb 1-1.3: New USB device found, idVendor=0403, idProduct=6001
[ 2.252015] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2.254856] usb 1-1.3: Product: FT232R USB UART
[ 2.257580] usb 1-1.3: Manufacturer: FTDI
[ 2.260269] usb 1-1.3: SerialNumber: AI06JVSG
...
[ 3.790404] usbcore: registered new interface driver usbserial
[ 3.790467] usbcore: registered new interface driver usbserial_generic
[ 3.790526] usbserial: USB Serial support registered for generic
...
[ 3.838772] usbcore: registered new interface driver ftdi_sio
[ 3.838843] usbserial: USB Serial support registered for FTDI USB Serial Device
[ 3.839163] ftdi_sio 1-1.3:1.0: FTDI USB Serial Device converter detected
[ 3.839301] usb 1-1.3: Detected FT232RL
[ 3.840604] usb 1-1.3: FTDI USB Serial Device converter now attached to ttyUSB0
After boot a driver is detected and assigned
root@PI-Wiggs1:/home/owner# cat /sys/kernel/debug/usb/devices
...
T: Bus=01 Lev=02 Prnt=02 Port=02 Cnt=02 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0403 ProdID=6001 Rev= 6.00
S: Manufacturer=FTDI
S: Product=FT232R USB UART
S: SerialNumber=AI06JVSG
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr= 90mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=ftdi_sio
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
When I unplug and replug the USB cable ttyUSB0 is disconnected, but not reconnected
root@PI-Wiggs1:/home/owner# tail -f /var/log/messages
...
Oct 4 16:13:21 PI-Wiggs1 kernel: [ 865.899279] usb 1-1.3: USB disconnect, device number 4
Oct 4 16:13:21 PI-Wiggs1 kernel: [ 865.899917] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
Oct 4 16:13:21 PI-Wiggs1 kernel: [ 865.900014] ftdi_sio 1-1.3:1.0: device disconnected
Oct 4 16:13:26 PI-Wiggs1 kernel: [ 870.545201] usb 1-1.3: new full-speed USB device number 5 using dwc_otg
Oct 4 16:13:26 PI-Wiggs1 kernel: [ 870.703944] usb 1-1.3: New USB device found, idVendor=0403, idProduct=6001
Oct 4 16:13:26 PI-Wiggs1 kernel: [ 870.703957] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Oct 4 16:13:26 PI-Wiggs1 kernel: [ 870.703965] usb 1-1.3: Product: FT232R USB UART
Oct 4 16:13:26 PI-Wiggs1 kernel: [ 870.703974] usb 1-1.3: Manufacturer: FTDI
Oct 4 16:13:26 PI-Wiggs1 kernel: [ 870.703982] usb 1-1.3: SerialNumber: AI06JVSG
After the unplug/plug, Driver=(none)
root@PI-Wiggs1:/home/owner# cat /sys/kernel/debug/usb/devices
...
T: Bus=01 Lev=02 Prnt=02 Port=02 Cnt=02 Dev#= 5 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0403 ProdID=6001 Rev= 6.00
S: Manufacturer=FTDI
S: Product=FT232R USB UART
S: SerialNumber=AI06JVSG
C: #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr= 90mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
