I am quite new to linux. I have two BeagleBone Black PCs with Yantrr Vayu2 4G modem, running on Debian 10. I am connecting to the internet using the ppp protocol and rnet. On first PC everything works fine. On the other one after while all /dev/ttyUSBXX are missing. The modem is connected via USB cable but I think it is not recognized. I tried everything but nothing works. I appriciate any help. Thank you!
I have tried disconnecting and rebooting multiple times, apt update and upgrade. I have run the udevadm monitor and disconnected and reconnected the modem. This is the output on PC1 (that works)
root@ES-23-001:/home/debian# sudo udevadm monitor -u
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
UDEV [1392.179308] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.1/ttyUSB1/tty/ttyUSB1 (tty)
UDEV [1392.267717] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.2/ttyUSB2/tty/ttyUSB2 (tty)
UDEV [1392.321697] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.1/ttyUSB1 (usb-serial)
UDEV [1392.352511] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0/tty/ttyUSB0 (tty)
UDEV [1392.406432] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.1/ttyUSB1 (usb-serial)
UDEV [1392.424347] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.1 (usb)
UDEV [1392.435601] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0 (usb-serial)
UDEV [1392.445325] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.2/ttyUSB2 (usb-serial)
UDEV [1392.455814] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.3/ttyUSB3/tty/ttyUSB3 (tty)
UDEV [1392.473412] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.2/ttyUSB2 (usb-serial)
UDEV [1392.512199] remove /devices/virtual/net/ppp0/queues/rx-0 (queues)
UDEV [1392.529478] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0 (usb-serial)
UDEV [1392.562879] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.1 (usb)
UDEV [1392.581837] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.2 (usb)
UDEV [1392.588271] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.3/ttyUSB3 (usb-serial)
UDEV [1392.611817] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.0 (usb)
UDEV [1392.624182] remove /devices/virtual/net/ppp0/queues/tx-0 (queues)
UDEV [1392.626737] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4/net/wwan0/queues/rx-0 (queues)
UDEV [1392.640314] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.2 (usb)
UDEV [1392.650454] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.0 (usb)
UDEV [1392.652824] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.3/ttyUSB3 (usb-serial)
UDEV [1392.658781] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4/net/wwan0/queues/tx-0 (queues)
UDEV [1392.740723] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4/usbmisc/cdc-wdm0 (usbmisc)
UDEV [1392.743974] remove /usbmisc (class)
UDEV [1392.763394] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.3 (usb)
UDEV [1392.777979] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1:1.0 (usb)
UDEV [1392.789570] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.3 (usb)
UDEV [1392.817506] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1:1.0 (usb)
UDEV [1392.860212] remove /devices/virtual/net/ppp0 (net)
UDEV [1392.898065] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4/net/wwan0 (net)
UDEV [1392.918675] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4 (usb)
UDEV [1392.923824] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4 (usb)
UDEV [1392.939208] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1 (usb)
UDEV [1392.943067] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1 (usb)
UDEV [1392.959512] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1 (usb)
UDEV [1392.974344] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1 (usb)
UDEV [1392.978512] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1 (usb)
UDEV [1392.995522] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1:1.0 (usb)
UDEV [1393.011458] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1:1.0 (usb)
UDEV [1393.024231] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1 (usb)
UDEV [1393.038080] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1:1.0 (usb)
UDEV [1393.041581] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1:1.0 (usb)
UDEV [1393.054691] unbind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1 (usb)
UDEV [1393.061798] remove /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1 (usb)
UDEV [1399.278232] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1 (usb)
UDEV [1399.330200] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1:1.0 (usb)
UDEV [1399.338557] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1:1.0 (usb)
UDEV [1399.350073] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1 (usb)
UDEV [1399.715314] add /class/usbmisc (class)
UDEV [1399.840265] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1 (usb)
UDEV [1400.084584] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.1 (usb)
UDEV [1400.105553] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.0 (usb)
UDEV [1400.149656] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.3 (usb)
UDEV [1400.169643] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.2 (usb)
UDEV [1400.199349] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4 (usb)
UDEV [1400.247247] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4/usbmisc/cdc-wdm0 (usbmisc)
UDEV [1400.305731] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.1/ttyUSB1 (usb-serial)
UDEV [1400.321751] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0 (usb-serial)
UDEV [1400.387234] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.3/ttyUSB3 (usb-serial)
UDEV [1400.422698] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.2/ttyUSB2 (usb-serial)
UDEV [1400.519200] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.1/ttyUSB1/tty/ttyUSB1 (tty)
UDEV [1400.548458] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.1/ttyUSB1 (usb-serial)
UDEV [1400.643388] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0/tty/ttyUSB0 (tty)
UDEV [1400.655855] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.1 (usb)
UDEV [1400.711817] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.0/ttyUSB0 (usb-serial)
UDEV [1400.759873] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.0 (usb)
UDEV [1400.765887] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.2/ttyUSB2/tty/ttyUSB2 (tty)
UDEV [1400.774009] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.3/ttyUSB3/tty/ttyUSB3 (tty)
UDEV [1400.787412] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.2/ttyUSB2 (usb-serial)
UDEV [1400.861183] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.3/ttyUSB3 (usb-serial)
UDEV [1400.872936] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.2 (usb)
UDEV [1400.880331] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.3 (usb)
UDEV [1401.089989] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4/net/wwan0 (net)
UDEV [1401.118058] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4/net/wwan0/queues/rx-0 (queues)
UDEV [1401.125276] add /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4/net/wwan0/queues/tx-0 (queues)
UDEV [1401.145860] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1/1-1.1:1.4 (usb)
UDEV [1401.173397] bind /devices/platform/ocp/47400000.usb/47401c00.usb/musb-hdrc.1/usb1/1-1/1-1.1 (usb)
UDEV [1422.925708] add /devices/virtual/net/ppp0 (net)
UDEV [1422.952483] add /devices/virtual/net/ppp0/queues/rx-0 (queues)
UDEV [1422.981487] add /devices/virtual/net/ppp0/queues/tx-0 (queues)
And this is on the non working PC:
enter image description here
I do not understand it, but there is no info about /dev/ttyUSB, so i think it could be a driver issue or something.
And when I try the lsusb command the modem is listed there:
enter image description here
But when I try to connect the /dev/ttyUSB3 is not there:
enter image description here
enter image description here
But on the first PC it is there:
enter image description here