Wifi keeps disconnecting

[Samuel Hangouët]

I have a box with 802-11n and I run into a problem with my Lenovo laptop :
- when I change the wifi password, it connects immediately and works well
- the next time (for example after switching the airplane mode on and off), it fails and the network manager keeps asking me the password again and again

Please notice that I have no problem with other wifi access points (when going in other places with my laptop), and my box works well with every other devices (ubuntu laptops, android phones) but mine !

My laptop runs an updated 20.04.4, but the problem first came when I was on 21.04. I then made a fresh install of 21.10 and then a fresh install on 20.04 just to make sure the kernel was not involved. Even tried the last Intel Clear Linux without success.

As a workaround, I tried to stop and restart wpa_supplicant:

sudo systemctl disable --now wpa_supplicant.service
sudo systemctl enable --now wpa_supplicant.service

but this did not solve the problem.
I also contacted the support of my ISP and they made a clear reset of my box without success.

Here is what I see in dmesg :

[ 4203.366374] wlp4s0: authenticate with e4:9e:12:8c:8e:1a
[ 4203.374010] wlp4s0: send auth to e4:9e:12:8c:8e:1a (try 1/3)
[ 4203.378464] wlp4s0: authenticated
[ 4203.383534] wlp4s0: associate with e4:9e:12:8c:8e:1a (try 1/3)
[ 4203.387408] wlp4s0: RX AssocResp from e4:9e:12:8c:8e:1a (capab=0x1411 status=0 aid=6)
[ 4203.391628] wlp4s0: associated
[ 4203.399358] wlp4s0: deauthenticating from e4:9e:12:8c:8e:1a by local choice (Reason: 17=IE_DIFFERENT)

And here is the restult of lspci :

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1)
00:1c.2 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #3 (rev f1)
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1)
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point-LP LPC Controller (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-V (rev 21)
02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
04:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 88)
05:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM961/PM961