Ubuntu 20.04 - No wifi adapter found (DELL Precision 7760) [duplicate]

After the latest updates (Terminal: sudo apt update & upgrade) my WiFi suddenly didn't work anymore. I did a fresh installation including all applications necessary for me and again did not work after the updates.

Yesterday I reproduced it after a fresh installation (20.04 LTS - latest version) WiFi is working until I do updates.

System: P14s AMD Gen2

WiFi: Intel Wifi 6 AX210 non vPro --> support at Kernel 5.10+

OS: dual boot with win 10 + 20.04.2 LTS Ubuntu Mate, Kernel 5.11.0.27

Bluetooth still works, WiFi stops working - not even in the network list - after sudo update&upgrade.

Any recommendations?

I just switched the WiFi card to Intel because the original one (RTL8852AE 11ax) didn't work...

ThinkPad-P14s-Gen-2a:~$ sudo modprobe iwlwifi && sudo dmesg | grep iwl    
[3.191724] iwlwifi 0000:03:00.0: enabling device (0000 -> 0002)    
[3.201020] iwlwifi 0000:03:00.0: api flags index 2 larger than supported by driver    
[3.201036] iwlwifi 0000:03:00.0: TLV_FW_FSEQ_VERSION: FSEQ Version: 93.8.63.28    
[3.201344] iwlwifi 0000:03:00.0: loaded firmware version 59.601f3a66.0 ty-a0-gf-a0-59.ucode op_mode iwlmvm                           
[3.287251] iwlwifi 0000:03:00.0: Detected Intel(R) Wi-Fi 6 AX210 160MHz, REV=0x420    
[3.447988] iwlwifi 0000:03:00.0: loaded PNVM version 0x324cd670    
[3.550190] iwlwifi 0000:03:00.0: Timeout waiting for PNVM load!    
[3.550200] iwlwifi 0000:03:00.0: Failed to start RT ucode: -110    
[3.550209] iwlwifi 0000:03:00.0: iwl_trans_send_cmd bad state = 1    
[3.754235] iwlwifi 0000:03:00.0: firmware didn't ACK the reset - continue anyway    
[3.766816] iwlwifi 0000:03:00.0: Failed to run INIT ucode: -110     

Solution 1:

[3.447988] iwlwifi 0000:03:00.0: loaded PNVM version 0x324cd670
[3.550190] iwlwifi 0000:03:00.0: Timeout waiting for PNVM load!
[3.550200] iwlwifi 0000:03:00.0: Failed to start RT ucode: -110

This is the subject of a well-known bug report: https://bugzilla.kernel.org/show_bug.cgi?id=212371#c13

Let's try the suggested fix. From the terminal:

sudo mv /usr/lib/firmware/iwlwifi-ty-a0-gf-a0.pnvm  /usr/lib/firmware/iwlwifi-ty-a0-gf-a0.bak

Reboot and tell us if there is any improvement.

EDIT: It appears that periodic updates to the package linux-firmware will install a new version of the offending file iwlwifi-ty-a0-gf-a0.pnvm and so this process will need to be repeated.