Ok, thanks for the update. Interestingly, AFAIK the iwlwifi driver
specifies a max API number (50 in case of the focal 5.4 kernel) and
tries to load that firmware and then walks down until it succeeds:

[    9.458673] iwlwifi 0000:52:00.0: Direct firmware load for 
iwlwifi-cc-a0-50.ucode failed with error -2
[    9.458850] iwlwifi 0000:52:00.0: Direct firmware load for 
iwlwifi-cc-a0-49.ucode failed with error -2
[    9.462480] iwlwifi 0000:52:00.0: loaded firmware version 48.4fa0041f.0 
op_mode iwlmvm

So the driver loaded iwlwifi-cc-a0-48.ucode and I'm surprised that
replacing -46.ucode made a difference for you.

Anyways, I'll close the ticket. If you come across this problem again,
please open a new ticket.

** Changed in: linux-firmware (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1914837

Title:
  enabling wifi crashes thinkpad x1 extreme (gen2)

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