firmware used :
Oct 18 07:53:37 alpha kernel: [    2.890212] iwlwifi 0000:02:00.0: Found debug 
destination: EXTERNAL_DRAM
Oct 18 07:53:37 alpha kernel: [    2.890217] iwlwifi 0000:02:00.0: Found debug 
configuration: 0
Oct 18 07:53:37 alpha kernel: [    2.890729] iwlwifi 0000:02:00.0: loaded 
firmware version 36.77d01142.0 8265-36.ucode op_mode iwlmvm


Oct 18 07:53:37 alpha kernel: [    3.009579] iwlwifi 0000:02:00.0: Detected 
Intel(R) Dual Band Wireless AC 8265, REV=0x230
Oct 18 07:53:37 alpha kernel: [    3.018214] iwlwifi 0000:02:00.0: Applying 
debug destination EXTERNAL_DRAM
Oct 18 07:53:37 alpha kernel: [    3.018517] i915 0000:00:02.0: [drm] Finished 
loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
Oct 18 07:53:37 alpha kernel: [    3.018811] iwlwifi 0000:02:00.0: Allocated 
0x00400000 bytes for firmware monitor.


Oct 18 07:53:37 alpha NetworkManager[785]: <info>  [1634536417.8264] rfkill3: 
found Wi-Fi radio killswitch (at 
/sys/devices/pci0000:00/0000:00:1c.2/0000:02:00.0/ieee80211/phy0/rfkill3) 
(driver iwlwifi)


rf-kill tells driver to disable when suspending :

Oct 18 09:40:24 alpha kernel: [ 6412.359962] iwlwifi 0000:02:00.0: RF_KILL bit 
toggled to disable radio.
Oct 18 09:40:24 alpha kernel: [ 6412.359966] iwlwifi 0000:02:00.0: reporting 
RF_KILL (radio disabled)


I get a WARN but no idea what it means :
Oct 18 09:40:24 alpha kernel: [ 6412.361368] WARNING: CPU: 7 PID: 11209 at 
drivers/net/wireless/intel/iwlwifi/pcie/tx.c:1613 iwl_trans_pcie_tx+0x63b/0x6f0 
[iwlwifi]

it seems once turned off by rfkill
the driver does not bring the card up when rfkill is used with "unlock" option
not even when done manually after coming back from suspend.

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https://bugs.launchpad.net/bugs/1947561

Title:
  wifi card goes into hardware disable on resume on Dell Latitude 5490

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