Ubuntu – Ubuntu 18.04 / iwlwifi : recurrent problems, now Airplane Mode activated and impossible to remove after suspend

Major Edit : the problem about "sudo modprobe iwlwifi" is solved ! I reset BIOS settings to optimized defaults and the problem disappeared on both Windows and Ubuntu. However, now I still have airplane mode activated and impossible to switch off after suspend.

Major Edit : I've tried on Windows and the Wi-Fi driver could not be loaded as well. Something really went wrong!

Dear AskUbuntu community,

Using a MSI P65 Creator 8RF laptop, I have just installed Ubuntu 18.04 LTS on my laptop. It is my first use of Ubuntu ever.

I am facing recurrent problems with the Wi-Fi driver. I have been facing the well-known problem with the system often switching to airplane mode after suspend, without me being unable to stop it unless suspending and logging in again one or several times.

My Wi-Fi card is Intel Wireless-AC 9560.

I tried to unload and reload iwlwifi by performing :

sudo modprobe -r iwlwifi
sudo modprobe iwlwifi

The first line indeed removed any form of Wi-Fi options on the desktop, but the second line now did not and still does not perform anything. Now I find myself unable to even restart the Wi-Fi. All the drivers seem up-to-date and rebooting does not help.

Does someone have any clue ?

Thank you in advance ! I am new to both Ubuntu and this forum, so I apologize if the question is ill-asked. If you need any other information, like the output of any terminal command line, I will edit the topic and show the answer.

EDIT 1 : thank you Chili555, so :

dmesg | grep iwl
[    3.071654] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
[    3.080785] iwlwifi 0000:00:14.3: loaded firmware version 34.0.0 op_mode iwlmvm
[    3.103001] iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9560, REV=0x318
[    3.150716] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
[    3.150722] iwlwifi 0000:00:14.3: Not valid error log pointer 0x00000000 for Init uCode
[    3.150989] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x3, CPU2 Status: 0x2459
[    3.151277] iwlwifi 0000:00:14.3: Failed to start INIT ucode: -5
[    3.166429] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -5
[  571.628552] iwlwifi 0000:00:14.3: loaded firmware version 34.0.0 op_mode iwlmvm
[  571.640682] iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9560, REV=0x318
[  571.686727] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
[  571.686734] iwlwifi 0000:00:14.3: Not valid error log pointer 0x00000000 for Init uCode
[  571.686843] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x3, CPU2 Status: 0x2458
[  571.686848] iwlwifi 0000:00:14.3: Failed to start INIT ucode: -5
[  571.699125] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -5

rfkill list all
0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

Before I removed iwlwifi with modprobe -r, "rfkill list all" would also show the Wi-Fi.

Edit 2 :

ls -al /lib/firmware | grep 9000
-rw-r--r--  1 root root 2632620 avril 24  2018 iwlwifi-9000-pu-b0-jf-b0-33.ucode
-rw-r--r--  1 root root 2677620 janv. 24 13:59 iwlwifi-9000-pu-b0-jf-b0-34.ucode
-rw-r--r--  1 root root 2520568 déc.  14 13:54 iwlwifi-9000-pu-b0-jf-b0-38.ucode

For your information, I also tried to reinstall the iwlwifi from Intel's website, maybe it explains why there are more than 1 result here. Of course, this procedure dit not help. I don't know if it made anything worse!

** Edit 3:**

Tried to reinstall the drivers but still have :

dmesg | grep iwl
[    3.115860] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
[    3.124078] iwlwifi 0000:00:14.3: loaded firmware version 34.3125811985.0 op_mode iwlmvm
[    3.158887] iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9560, REV=0x318
[    3.208187] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
[    3.208190] iwlwifi 0000:00:14.3: Not valid error log pointer 0x00000000 for Init uCode
[    3.208246] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x3, CPU2 Status: 0x2458
[    3.208248] iwlwifi 0000:00:14.3: Failed to start INIT ucode: -5
[    3.220168] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -5