Modem is not found after some FW upgrade in the past.
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8306.934106] usb 3-1: new high-speed USB device number 32 using xhci-hcd
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8307.264145] option 3-1:1.0: GSM modem (1-port) converter detected
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8307.264534] usb 3-1: GSM modem (1-port) converter now attached to ttyUSB0
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8307.270002] option 3-1:1.1: GSM modem (1-port) converter detected
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8307.276494] usb 3-1: GSM modem (1-port) converter now attached to ttyUSB1
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8307.282809] option 3-1:1.2: GSM modem (1-port) converter detected
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8307.291139] usb 3-1: GSM modem (1-port) converter now attached to ttyUSB3
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8307.295749] option 3-1:1.3: GSM modem (1-port) converter detected
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8307.302093] usb 3-1: GSM modem (1-port) converter now attached to ttyUSB4
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8307.327651] qmi_wwan 3-1:1.4: cdc-wdm0: USB WDM device
Wed Aug 28 10:18:06 2024 kern.info kernel: [ 8307.329430] qmi_wwan 3-1:1.4 wwan0: register 'qmi_wwan' at usb-xhci-hcd.1.auto-1, WWAN/QMI device, 32:07:3a:07:8e:85
Wed Aug 28 10:18:06 2024 user.warn kernel: [ 8307.374027] [01-serial-symlink.sh] New device ttyUSB0 at /devices/platform/soc/60f8800.usb2/6000000.dwc3/xhci-hcd.1.auto/usb3/3-1/3-1:1.0/ttyUSB0/tty/ttyUSB0 appeared!
Wed Aug 28 10:18:06 2024 user.warn kernel: [ 8307.523168] [01-serial-symlink.sh] New device ttyUSB1 at /devices/platform/soc/60f8800.usb2/6000000.dwc3/xhci-hcd.1.auto/usb3/3-1/3-1:1.1/ttyUSB1/tty/ttyUSB1 appeared!
Wed Aug 28 10:18:07 2024 user.warn kernel: [ 8307.675362] [01-serial-symlink.sh] New device ttyUSB3 at /devices/platform/soc/60f8800.usb2/6000000.dwc3/xhci-hcd.1.auto/usb3/3-1/3-1:1.2/ttyUSB3/tty/ttyUSB3 appeared!
Wed Aug 28 10:18:07 2024 user.warn kernel: [ 8307.826019] [01-serial-symlink.sh] New device ttyUSB4 at /devices/platform/soc/60f8800.usb2/6000000.dwc3/xhci-hcd.1.auto/usb3/3-1/3-1:1.3/ttyUSB4/tty/ttyUSB4 appeared!
Wed Aug 28 10:18:23 2024 daemon.info gsmd[2488]: [__init:1165] error: [CMM] Failed to open modem at `/dev/` path!
Wed Aug 28 10:18:23 2024 daemon.info gsmd[2488]: [__init:420] error: [MODEM] Failed to initialize comm manager for `3-1 [2c7c:0306]` modem!
Wed Aug 28 10:18:23 2024 daemon.info gsmd[2488]: [__new_modem:697] error: [MODEM_MANAGER] Failed to initialize `3-1 [2c7c:0306]` modem!
Wed Aug 28 10:18:23 2024 daemon.info gsmd[2488]: [__modem_added:506] error: [MODEM_MANAGER] Unable to initialize `3-1 [2c7c:0306]` modem!
Wed Aug 28 10:18:25 2024 kern.info kernel: [ 8326.044987] usb 3-1: USB disconnect, device number 32
Wed Aug 28 10:18:25 2024 kern.info kernel: [ 8326.045643] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
Wed Aug 28 10:18:25 2024 kern.info kernel: [ 8326.049230] option 3-1:1.0: device disconnected
Wed Aug 28 10:18:25 2024 kern.info kernel: [ 8326.058978] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
Wed Aug 28 10:18:25 2024 kern.info kernel: [ 8326.061518] option 3-1:1.1: device disconnected
Wed Aug 28 10:18:25 2024 kern.info kernel: [ 8326.070240] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
Wed Aug 28 10:18:25 2024 kern.info kernel: [ 8326.073991] option 3-1:1.2: device disconnected
Wed Aug 28 10:18:25 2024 kern.info kernel: [ 8326.085942] option1 ttyUSB4: GSM modem (1-port) converter now disconnected from ttyUSB4
Wed Aug 28 10:18:25 2024 kern.info kernel: [ 8326.086582] option 3-1:1.3: device disconnected
Wed Aug 28 10:18:25 2024 kern.info kernel: [ 8326.094850] qmi_wwan 3-1:1.4 wwan0: unregister 'qmi_wwan' usb-xhci-hcd.1.auto-1, WWAN/QMI device
Wed Aug 28 10:18:25 2024 user.warn kernel: [ 8326.125599] [01-serial-symlink.sh] New device ttyUSB0 at /devices/platform/soc/60f8800.usb2/6000000.dwc3/xhci-hcd.1.auto/usb3/3-1/3-1:1.0/ttyUSB0/tty/ttyUSB0 appeared!
Wed Aug 28 10:18:25 2024 user.warn kernel: [ 8326.283306] [01-serial-symlink.sh] New device ttyUSB1 at /devices/platform/soc/60f8800.usb2/6000000.dwc3/xhci-hcd.1.auto/usb3/3-1/3-1:1.1/ttyUSB1/tty/ttyUSB1 appeared!
Wed Aug 28 10:18:25 2024 user.warn kernel: [ 8326.434856] [01-serial-symlink.sh] New device ttyUSB3 at /devices/platform/soc/60f8800.usb2/6000000.dwc3/xhci-hcd.1.auto/usb3/3-1/3-1:1.2/ttyUSB3/tty/ttyUSB3 appeared!
Wed Aug 28 10:18:26 2024 user.warn kernel: [ 8326.588247] [01-serial-symlink.sh] New device ttyUSB4 at /devices/platform/soc/60f8800.usb2/6000000.dwc3/xhci-hcd.1.auto/usb3/3-1/3-1:1.3/ttyUSB4/tty/ttyUSB4 appeared!
What can I do in what order to find the modem again?