I loaded the iwlwifi module with debug=1 option to get more details. I hope it 
helps
➜ sudo dmesg|grep wifi -i      
[    6.484062] Loading modules backported from iwlwifi
[    6.484063] iwlwifi-stack-public:master:9858:4c7cba27
[    6.576473] Intel(R) Wireless WiFi driver for Linux
[    6.577121] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
[    6.585684] iwlwifi: No config found for PCI dev 43f0/1672, rev=0x351, 
rfid=0x2010d000
[    6.585742] iwlwifi: probe of 0000:00:14.3 failed with error -22
[  177.897898] Intel(R) Wireless WiFi driver for Linux
[  177.898344] iwlwifi 0000:00:14.3: iwl_trans_pcie_alloc HW REV: 0x351
[  177.898865] iwlwifi 0000:00:14.3: iwl_pcie_set_interrupt_capa MSI-X enabled. 
16 interrupt vectors were allocated
[  177.898867] iwlwifi 0000:00:14.3: iwl_pcie_set_interrupt_capa MSI-X enabled 
with rx queues 15, vec mask 0x0
[  177.899758] iwlwifi 0000:00:14.3: iwl_pcie_prepare_card_hw 
iwl_trans_prepare_card_hw enter
[  177.899782] iwlwifi 0000:00:14.3: iwl_pcie_set_hw_ready hardware ready
[  177.899797] iwlwifi: No config found for PCI dev 43f0/1672, rev=0x351, 
rfid=0x2010d000
[  177.899803] iwlwifi 0000:00:14.3: iwl_pcie_rx_free Free NULL rx context
[  177.899814] iwlwifi: probe of 0000:00:14.3 failed with error -22

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https://bugs.launchpad.net/bugs/1969966

Title:
  No support for Intel Killer AX1675i

Status in linux-firmware package in Ubuntu:
  New

Bug description:
  I just installed a Intel Killer AX1675i Wifi+Bluetooth card in my Dell G15 
5511 laptop but can't get WiFi or Bluetooth.
  About WiFi I get these logs:
  ➜ sudo dmesg|grep wifi -i       
  [    4.917786] Loading modules backported from iwlwifi
  [    4.917787] iwlwifi-stack-public:master:9858:4c7cba27
  [    4.984194] Intel(R) Wireless WiFi driver for Linux
  [    4.985038] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
  [    4.996087] iwlwifi: No config found for PCI dev 43f0/1672, rev=0x351, 
rfid=0x2010d000
  [    4.996123] iwlwifi: probe of 0000:00:14.3 failed with error -22
  About Bluetooth I get these logs:
  ➜ sudo dmesg|grep bluetooth -i
  [    4.977780] Bluetooth: Core ver 2.22
  [    4.977793] NET: Registered PF_BLUETOOTH protocol family
  [    4.977794] Bluetooth: HCI device and connection manager initialized
  [    4.977799] Bluetooth: HCI socket layer initialized
  [    4.977800] Bluetooth: L2CAP socket layer initialized
  [    4.977803] Bluetooth: SCO socket layer initialized
  [    5.002780] Bluetooth: hci0: Bootloader revision 0.3 build 0 week 30 2018
  [    5.003784] Bluetooth: hci0: Device revision is 0
  [    5.003787] Bluetooth: hci0: Secure boot is enabled
  [    5.003788] Bluetooth: hci0: OTP lock is enabled
  [    5.003788] Bluetooth: hci0: API lock is enabled
  [    5.003789] Bluetooth: hci0: Debug lock is disabled
  [    5.003789] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
  [    5.006774] Bluetooth: hci0: Failed to load Intel firmware file 
intel/ibt-19-0-3.sfi (-2)
  [    5.007774] Bluetooth: hci0: MSFT supported features length mismatch
  [    7.023197] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
  [    7.023201] Bluetooth: BNEP filters: protocol multicast
  [    7.023204] Bluetooth: BNEP socket layer initialized
  I'm in doubt about WiFi, since the message doesn't mention a missing 
firmware, but Bluetooth is very clear about it.

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