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Hello,

I have installed HP lt4120 Snapdragon X5 LTE GSM module, but doen't like to work for me
After kernel update ask me for pin (Plasma desktop) and after each reboot doen't work. I have tested a lot of ideas to add different lines in udev, but nothing happens

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Bus 001 Device 006: ID 8087:0a2a Intel Corp. Bluetooth wireless interface
Bus 001 Device 007: ID 138a:003f Validity Sensors, Inc. VFS495 Fingerprint Reader
Bus 001 Device 005: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 004: ID 03f0:9d1d HP, Inc HP lt4120 Snapdragon X5 LTE

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[root@localhost ~]# lsmod | grep usbnet
lsmod | grep cdc_ether
lsmod | grep cdc_mbim
lsmod | grep cdc_wdm
lsmod | grep qmi_wwan
usbnet                 61440  4 cdc_mbim,cdc_ncm,qmi_wwan,cdc_ether
mii                    16384  1 usbnet
cdc_ether              24576  1 cdc_ncm
usbnet                 61440  4 cdc_mbim,cdc_ncm,qmi_wwan,cdc_ether
cdc_mbim               16384  0
cdc_ncm                49152  1 cdc_mbim
cdc_wdm                32768  2 cdc_mbim,qmi_wwan
usbnet                 61440  4 cdc_mbim,cdc_ncm,qmi_wwan,cdc_ether
cdc_wdm                32768  2 cdc_mbim,qmi_wwan
qmi_wwan               40960  0
cdc_wdm                32768  2 cdc_mbim,qmi_wwan
usbnet                 61440  4 cdc_mbim,cdc_ncm,qmi_wwan,cdc_ether

Dmesg:

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[    1.611143] usb 1-1.2: new high-speed USB device number 4 using ehci-pci
[    1.725323] usb 1-1.2: New USB device found, idVendor=03f0, idProduct=9d1d, bcdDevice= 2.28
[    1.725337] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    1.725341] usb 1-1.2: Product: HP lt4120 Snapdragon X5 LTE
[    1.725344] usb 1-1.2: Manufacturer: HP
[    1.725359] usb 1-1.2: SerialNumber: 0123456789ABCDEF
[   17.738071] usbcore: registered new interface driver cdc_wdm
[   17.745875] cdc_ether 1-1.2:2.0 eth1: register 'cdc_ether' at usb-0000:00:12.0-1.2, CDC Ethernet Device, 32:84:81:40:eb:ae
[   17.745976] usbcore: registered new interface driver cdc_ether
[   17.824018] cdc_ether 1-1.2:2.0 enp0s18u1u2c2: renamed from eth1
[   20.785959] cdc_ether 1-1.2:2.0 enp0s18u1u2c2: unregister 'cdc_ether' usb-0000:00:12.0-1.2, CDC Ethernet Device

Hi there, you may need to switch between the 3 modes using usb_modeswitch, see e.g. https://www.draisberghof.de/usb_modeswi ... php?t=2630