Modem PCI LTE integrato su HP EliteBook 850 G5 non riconosciuto sotto Arch Linux

Sto cercando di eseguire un modem LTE su un HP EliteBook 850 G5. Ma sembra che non sia riconosciuto dal sistema. Ricevo un messaggio dal modem manager:

ModemManager [417]: Impossibile controllare il supporto per il dispositivo '/sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0': non supportato da nessun plug-in ModemManager [417]: Impossibile controlla il supporto per il dispositivo '/sys/devices/pci0000:00/0000:00:1f.6': non supportato da nessun plugin

$ sudo systemctl status ModemManager.service
● ModemManager.service - Modem Manager
    Loaded: loaded (/usr/lib/systemd/system/ModemManager.service; enabled; vendor preset: disabled)
    Active: active (running) since Fri 2018-07-06 19:43:46 CEST; 1h 44min ago
Main PID: 417 (ModemManager)
Tasks: 3 (limit: 4915)
    Memory: 6.8M
    CGroup: /system.slice/ModemManager.service
       └─417 /usr/bin/ModemManager

systemd[1]: Starting Modem Manager...
ModemManager[417]: <info>  ModemManager (version 1.8.0) starting in system bus...
systemd[1]: Started Modem Manager.
ModemManager[417]: <info>  Couldn't check support for device '/sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0': not supported by any plugin
ModemManager[417]: <info>  Couldn't check support for device '/sys/devices/pci0000:00/0000:00:1f.6': not supported by any plugin

$ uname -r
4.17.2-1-ARCH

$ udevadm info -a -p /sys/class/pci_bus/0000:01
looking at device '/devices/pci0000:00/0000:00:1c.0/pci_bus/0000:01':
  KERNEL=="0000:01"
  SUBSYSTEM=="pci_bus"
  DRIVER==""
  ATTR{cpuaffinity}=="ff"
  ATTR{cpulistaffinity}=="0-7"

looking at parent device '/devices/pci0000:00/0000:00:1c.0':
  KERNELS=="0000:00:1c.0"
  SUBSYSTEMS=="pci"
  DRIVERS=="pcieport"
  ATTRS{ari_enabled}=="0"
  ATTRS{broken_parity_status}=="0"
  ATTRS{class}=="0x060400"
  ATTRS{consistent_dma_mask_bits}=="32"
  ATTRS{current_link_speed}=="2.5 GT/s"
  ATTRS{current_link_width}=="1"
  ATTRS{d3cold_allowed}=="1"
  ATTRS{device}=="0x9d13"
  ATTRS{devspec}==""
  ATTRS{dma_mask_bits}=="32"
  ATTRS{driver_override}=="(null)"
  ATTRS{enable}=="1"
  ATTRS{irq}=="19"
  ATTRS{local_cpulist}=="0-7"
  ATTRS{local_cpus}=="ff"
  ATTRS{max_link_speed}=="8 GT/s"
  ATTRS{max_link_width}=="1"
  ATTRS{msi_bus}=="1"
  ATTRS{numa_node}=="-1"
  ATTRS{revision}=="0xf1"
  ATTRS{secondary_bus_number}=="1"
  ATTRS{subordinate_bus_number}=="1"
  ATTRS{subsystem_device}=="0x83b2"
  ATTRS{subsystem_vendor}=="0x103c"
  ATTRS{vendor}=="0x8086"

looking at parent device '/devices/pci0000:00':
  KERNELS=="pci0000:00"
  SUBSYSTEMS==""
  DRIVERS==""

$ sudo /sbin/lspci -nnk
00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers [8086:5914] (rev 08)
    Subsystem: Hewlett-Packard Company Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers [103c:83b2]
00:02.0 VGA compatible controller [0300]: Intel Corporation UHD Graphics 620 [8086:5917] (rev 07)
    Subsystem: Hewlett-Packard Company UHD Graphics 620 [103c:83b2]
    Kernel driver in use: i915
    Kernel modules: i915
00:04.0 Signal processing controller [1180]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [8086:1903] (rev 08)
    Subsystem: Hewlett-Packard Company Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [103c:83b2]
    Kernel driver in use: proc_thermal
    Kernel modules: processor_thermal_device
00:13.0 Non-VGA unclassified device [0000]: Intel Corporation Sunrise Point-LP Integrated Sensor Hub [8086:9d35] (rev 21)
    Subsystem: Hewlett-Packard Company Sunrise Point-LP Integrated Sensor Hub [103c:83b2]
    Kernel driver in use: intel_ish_ipc
    Kernel modules: intel_ish_ipc
00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller [8086:9d2f] (rev 21)
    Subsystem: Hewlett-Packard Company Sunrise Point-LP USB 3.0 xHCI Controller [103c:83b2]
    Kernel driver in use: xhci_hcd
    Kernel modules: xhci_pci
00:14.2 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Thermal subsystem [8086:9d31] (rev 21)
    Subsystem: Hewlett-Packard Company Sunrise Point-LP Thermal subsystem [103c:83b2]
    Kernel driver in use: intel_pch_thermal
    Kernel modules: intel_pch_thermal
00:15.0 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 [8086:9d60] (rev 21)
    Subsystem: Hewlett-Packard Company Sunrise Point-LP Serial IO I2C Controller [103c:83b2]
    Kernel driver in use: intel-lpss
    Kernel modules: intel_lpss_pci
00:15.1 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 [8086:9d61] (rev 21)
    Subsystem: Hewlett-Packard Company Sunrise Point-LP Serial IO I2C Controller [103c:83b2]
    Kernel driver in use: intel-lpss
    Kernel modules: intel_lpss_pci
00:16.0 Communication controller [0780]: Intel Corporation Sunrise Point-LP CSME HECI #1 [8086:9d3a] (rev 21)
    Subsystem: Hewlett-Packard Company Sunrise Point-LP CSME HECI [103c:83b2]
    Kernel driver in use: mei_me
    Kernel modules: mei_me
00:1c.0 PCI bridge [0604]: Intel Corporation Device [8086:9d13] (rev f1)
    Kernel driver in use: pcieport
    Kernel modules: shpchp
00:1c.4 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 [8086:9d14] (rev f1)
    Kernel driver in use: pcieport
    Kernel modules: shpchp
00:1c.6 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #7 [8086:9d16] (rev f1)
    Kernel driver in use: pcieport
    Kernel modules: shpchp
00:1d.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 [8086:9d18] (rev f1)
    Kernel driver in use: pcieport
    Kernel modules: shpchp
00:1f.0 ISA bridge [0601]: Intel Corporation Intel(R) 100 Series Chipset Family LPC Controller/eSPI Controller - 9D4E [8086:9d4e] (rev 21)
    Subsystem: Hewlett-Packard Company Intel(R) 100 Series Chipset Family LPC Controller/eSPI Controller - 9D4E [103c:83b2]
00:1f.2 Memory controller [0580]: Intel Corporation Sunrise Point-LP PMC [8086:9d21] (rev 21)
    Subsystem: Hewlett-Packard Company Sunrise Point-LP PMC [103c:83b2]
00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-LP HD Audio [8086:9d71] (rev 21)
    Subsystem: Hewlett-Packard Company Sunrise Point-LP HD Audio [103c:83b2]
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel, snd_soc_skl
00:1f.4 SMBus [0c05]: Intel Corporation Sunrise Point-LP SMBus [8086:9d23] (rev 21)
    Subsystem: Hewlett-Packard Company Sunrise Point-LP SMBus [103c:83b2]
    Kernel driver in use: i801_smbus
    Kernel modules: i2c_i801
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (4) I219-V [8086:15d8] (rev 21)
    Subsystem: Hewlett-Packard Company Ethernet Connection (4) I219-V [103c:83b2]
    Kernel driver in use: e1000e
    Kernel modules: e1000e
01:00.0 Network controller [0280]: Intel Corporation Wireless 8265 / 8275 [8086:24fd] (rev 78)
    Subsystem: Intel Corporation Dual Band Wireless-AC 8265 [8086:0010]
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi
3b:00.0 Wireless controller [0d40]: Intel Corporation Device [8086:7360] (rev 01)
    Subsystem: Hewlett-Packard Company Device [103c:8337]
3c:00.0 Non-Volatile memory controller [0108]: Toshiba America Info Systems Device [1179:0116]
    Subsystem: Toshiba America Info Systems Device [1179:0001]
    Kernel driver in use: nvme

Qualche idea su come farlo funzionare?

Sembra che il "controller wireless" su 3b:00.0sia il modem PCI LTE; google l'ID lo 8086:7360conferma.

Quindi i messaggi di modem manager sono spuri.

Googling attiva anche questo tweet da aprile 2018, il che fa sembrare che al momento non ci siano driver per questo dispositivo nel kernel di Linux.