Hi,
I'm running on Ubuntu Bionic 4.14.94-155 on an odroid-x4 (armhf).
I have a FT230X Basic UART (0403:6015) plugged into the exynos-ohci USB.
The device is linked via a udev rule to a "symbolic/virtual" device so
that the software FHEM can address it independent of the real ttyUSB* name.
I constantly see disconnects for the device in the kernel log, see log
excerpts below. I've found similar issues online going back till 2012
but there seems to be no solution so far. I'd like to help find the
cause if possible.
Regards,
Bjoern
Aug 4 11:25:11 fhem2 kernel: [2476586.963898] usb 2-1: USB disconnect,
device number 66
Aug 4 11:25:11 fhem2 kernel: [2476586.965833] ftdi_sio ttyUSB0: error
from flowcontrol urb
Aug 4 11:25:11 fhem2 kernel: [2476586.976811] ftdi_sio ttyUSB0: FTDI
USB Serial Device converter now disconnected from ttyUSB0
Aug 4 11:25:11 fhem2 kernel: [2476586.977232] ftdi_sio 2-1:1.0: device
disconnected
Aug 4 11:25:12 fhem2 kernel: [2476587.453089] usb 2-1: new full-speed
USB device number 67 using exynos-ohci
Aug 4 11:25:12 fhem2 kernel: [2476587.690677] usb 2-1: New USB device
found, idVendor=0403, idProduct=6015
Aug 4 11:25:12 fhem2 kernel: [2476587.690701] usb 2-1: New USB device
strings: Mfr=1, Product=2, SerialNumber=3
Aug 4 11:25:12 fhem2 kernel: [2476587.690718] usb 2-1: Product: FT230X
Basic UART
Aug 4 11:25:12 fhem2 kernel: [2476587.690733] usb 2-1: Manufacturer: FTDI
Aug 4 11:25:12 fhem2 kernel: [2476587.690748] usb 2-1: SerialNumber:
DN03L5HK
Aug 4 11:25:12 fhem2 kernel: [2476587.697068] ftdi_sio 2-1:1.0: FTDI
USB Serial Device converter detected
Aug 4 11:25:12 fhem2 kernel: [2476587.697388] usb 2-1: Detected FT-X
Aug 4 11:25:12 fhem2 kernel: [2476587.701288] usb 2-1: FTDI USB Serial
Device converter now attached to ttyUSB0
Aug 4 19:43:11 fhem2 kernel: [2506466.787738] usb usb2-port1: disabled
by hub (EMI?), re-enabling...
Aug 4 19:43:11 fhem2 kernel: [2506466.792968] usb 2-1: USB disconnect,
device number 67
Aug 4 19:43:11 fhem2 kernel: [2506466.794825] ftdi_sio ttyUSB0: error
from flowcontrol urb
Aug 4 19:43:11 fhem2 kernel: [2506466.803026] ftdi_sio ttyUSB0: FTDI
USB Serial Device converter now disconnected from ttyUSB0
Aug 4 19:43:11 fhem2 kernel: [2506466.803630] ftdi_sio 2-1:1.0: device
disconnected
Aug 4 19:43:11 fhem2 kernel: [2506467.139384] usb 2-1: new full-speed
USB device number 68 using exynos-ohci
Aug 4 19:43:12 fhem2 kernel: [2506467.377550] usb 2-1: New USB device
found, idVendor=0403, idProduct=6015
Aug 4 19:43:12 fhem2 kernel: [2506467.377574] usb 2-1: New USB device
strings: Mfr=1, Product=2, SerialNumber=3
Aug 4 19:43:12 fhem2 kernel: [2506467.377590] usb 2-1: Product: FT230X
Basic UART
Aug 4 19:43:12 fhem2 kernel: [2506467.377606] usb 2-1: Manufacturer: FTDI
Aug 4 19:43:12 fhem2 kernel: [2506467.377620] usb 2-1: SerialNumber:
DN03L5HK
Aug 4 19:43:12 fhem2 kernel: [2506467.383884] ftdi_sio 2-1:1.0: FTDI
USB Serial Device converter detected
Aug 4 19:43:12 fhem2 kernel: [2506467.384291] usb 2-1: Detected FT-X
Aug 4 19:43:12 fhem2 kernel: [2506467.388093] usb 2-1: FTDI USB Serial
Device converter now attached to ttyUSB0
Aug 6 07:46:23 fhem2 kernel: [2636259.004563] usb 2-1: USB disconnect,
device number 68
Aug 6 07:46:23 fhem2 kernel: [2636259.005393] ftdi_sio ttyUSB0: error
from flowcontrol urb
Aug 6 07:46:23 fhem2 kernel: [2636259.011179] ftdi_sio ttyUSB0: FTDI
USB Serial Device converter now disconnected from ttyUSB0
Aug 6 07:46:23 fhem2 kernel: [2636259.011347] ftdi_sio 2-1:1.0: device
disconnected
Aug 6 07:46:24 fhem2 kernel: [2636259.491782] usb 2-1: new full-speed
USB device number 69 using exynos-ohci
Aug 6 07:46:24 fhem2 kernel: [2636259.730054] usb 2-1: New USB device
found, idVendor=0403, idProduct=6015
Aug 6 07:46:24 fhem2 kernel: [2636259.730079] usb 2-1: New USB device
strings: Mfr=1, Product=2, SerialNumber=3
Aug 6 07:46:24 fhem2 kernel: [2636259.730095] usb 2-1: Product: FT230X
Basic UART
Aug 6 07:46:24 fhem2 kernel: [2636259.730110] usb 2-1: Manufacturer: FTDI
Aug 6 07:46:24 fhem2 kernel: [2636259.730125] usb 2-1: SerialNumber:
DN03L5HK
Aug 6 07:46:24 fhem2 kernel: [2636259.736360] ftdi_sio 2-1:1.0: FTDI
USB Serial Device converter detected
Aug 6 07:46:24 fhem2 kernel: [2636259.736715] usb 2-1: Detected FT-X
Aug 6 07:46:24 fhem2 kernel: [2636259.740832] usb 2-1: FTDI USB Serial
Device converter now attached to ttyUSB2
Aug 6 12:08:56 fhem2 kernel: [2652012.201328] usb 2-1: USB disconnect,
device number 69
Aug 6 12:08:56 fhem2 kernel: [2652012.202561] ftdi_sio ttyUSB2: error
from flowcontrol urb
Aug 6 12:08:56 fhem2 kernel: [2652012.209322] ftdi_sio ttyUSB2: FTDI
USB Serial Device converter now disconnected from ttyUSB2
Aug 6 12:08:56 fhem2 kernel: [2652012.209579] ftdi_sio 2-1:1.0: device
disconnected
Aug 6 12:08:57 fhem2 kernel: [2652012.684908] usb 2-1: new full-speed
USB device number 70 using exynos-ohci
Aug 6 12:08:57 fhem2 kernel: [2652012.922996] usb 2-1: New USB device
found, idVendor=0403, idProduct=6015
Aug 6 12:08:57 fhem2 kernel: [2652012.923021] usb 2-1: New USB device
strings: Mfr=1, Product=2, SerialNumber=3
Aug 6 12:08:57 fhem2 kernel: [2652012.923037] usb 2-1: Product: FT230X
Basic UART
Aug 6 12:08:57 fhem2 kernel: [2652012.923053] usb 2-1: Manufacturer: FTDI
Aug 6 12:08:57 fhem2 kernel: [2652012.923067] usb 2-1: SerialNumber:
DN03L5HK
Aug 6 12:08:57 fhem2 kernel: [2652012.929686] ftdi_sio 2-1:1.0: FTDI
USB Serial Device converter detected
Aug 6 12:08:57 fhem2 kernel: [2652012.930094] usb 2-1: Detected FT-X
Aug 6 12:08:57 fhem2 kernel: [2652012.933614] usb 2-1: FTDI USB Serial
Device converter now attached to ttyUSB0
