I recently updated Ubuntu from 20.04.1 LTS to 22.04.1 LTS and since I experience very unstable wifi connection on my Lenovo T460 with a wireless adapter Intel Wireless 8260
I have also I have a Windows 10 dual boot. fast startup is disabled.
Sometime when I startup Ubuntu, no wifi adapter is found at all. A few restarts could make it available again, with kernel 220.127.116.11 or using the previous available kernel version 5.15.0-46-generic Now it is never available.
Network controller : Intel Corporation Wireless 8260 [8086:24f3] (rev ff) Kernel driver in use: iwlwifi Kernel modules: iwlwifi
sudo dpkg -s linux-firmware | grep -i version
sudo modprobe iwlwifi: Displays nothing
sudo dmesg | grep iwl: Displays nothing
dkms status: Displays nothing
I have tried below, as suggested in a similar issue, but it did not help
sudo mv /usr/lib/firmware/iwlwifi-ty-a0-gf-a0.pnvm /usr/lib/firmware/iwlwifi-ty-a0-gf-a0.bak
Remaining pnvm files below as been also moved to .bak files
ls /usr/lib/firmware | grep -i pnvm
Any help is welcome as I am not familiar at all with Linux driver issues