On Sun, Oct 20, 2024 at 11:33 PM Timothy M Butterworth
<timothy.m.butterworth@gmail.com> wrote:
>
> I have the following device:
> Bus 003 Device 010: ID 0403:6001 Future Technology Devices International, Ltd FT232 Serial (UART) IC
>
> I expect the device to show up as: /dev/ttyUSB0 but i am not finding any ttyUSB devices in /dev.
>
> I Googled around some and found that the drivers for this device have been included in the Linux kernel since version 3.0.
>
> I have two of these and when I plug-in both I get ttyUSB0. If I unplug either USB interfaces then I loose ttyUSB0.
>
> Linux Hardware shows the device failing on Debian 12. Which is strange since I was using this device just fine on Debian 12. I am currently running trixie.
> https://linux-hardware.org/?id=usb:0403-6001
>
> Does anyone have any ideas.
The tail of dmesg probably has more information.
[366859.676600] usb 3-2.4.2: new full-speed USB device number 18 using xhci_hcd
[366859.800963] usb 3-2.4.2: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
[366859.800976] usb 3-2.4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[366859.800980] usb 3-2.4.2: Product: FT232R USB UART
[366859.800983] usb 3-2.4.2: Manufacturer: FTDI
[366859.800985] usb 3-2.4.2: SerialNumber: AB5RTY8F
[366859.807076] ftdi_sio 3-2.4.2:1.0: FTDI USB Serial Device converter detected
[366859.807133] usb 3-2.4.2: Detected FT232R
[366859.815334] usb 3-2.4.2: FTDI USB Serial Device converter now attached to ttyUSB0
[366863.879208] usb 3-2.4.2: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1
[366863.882652] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
[366863.882687] ftdi_sio 3-2.4.2:1.0: device disconnected
brltty seems to be causing a conflict. I purged brltty and now it works perfectly.
[367113.900361] usb 3-2.4.2: new full-speed USB device number 19 using xhci_hcd
[367114.028071] usb 3-2.4.2: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
[367114.028086] usb 3-2.4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[367114.028090] usb 3-2.4.2: Product: FT232R USB UART
[367114.028093] usb 3-2.4.2: Manufacturer: FTDI
[367114.028096] usb 3-2.4.2: SerialNumber: AB5RTY8F
[367114.034822] ftdi_sio 3-2.4.2:1.0: FTDI USB Serial Device converter detected
[367114.034868] usb 3-2.4.2: Detected FT232R
[367114.043377] usb 3-2.4.2: FTDI USB Serial Device converter now attached to ttyUSB0
Thanks
Jeff