Debian 10 Buster
It looks there are a bunch of topics on WIFI Intel Corporation Wireless-AC 9260 and I went over them and still, I couldn't figure out my problem.
My Wifi connection was good. Then I played with the configuration to learn using nmcli and other tools and all went wrong. Now my network manager detects WIFI networks but is not connecting. I am connected to an ethernet port now from a hotspot.
Network-manager and network-manager-gnome seems to be running Firmware looks is there:
sudo dmesg | grep iwlwifi [ 8.290464] iwlwifi 0000:04:00.0: enabling device (0000 -> 0002) [ 8.354030] iwlwifi 0000:04:00.0: firmware: direct-loading firmware iwlwifi-9260-th-b0-jf-b0-38.ucode [ 8.354519] iwlwifi 0000:04:00.0: loaded firmware version 38.755cfdd8.0 op_mode iwlmvm [ 8.456600] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 9260, REV=0x324 [ 8.505714] iwlwifi 0000:04:00.0: base HW address: (i removed the numbers) [ 8.608357] iwlwifi 0000:04:00.0 wlp4s0: renamed from wlan0 sudo uname -r 4.19.0-12-amd64
I tried to remove firmware-iwlwifi, reinstall. NO effect. I reinstalled network-manager. No effect. I have no idea what is going on. Any help?thanks
 Some more clues I found where this seems to be failing but I have not found the fix.
:~$ nmcli dev status DEVICE TYPE STATE CONNECTION eno1 ethernet connected eno1 wlp4s0 wifi disconnected -- lo loopback unmanaged --
The device wlp4s0 is disconnected I search how to connect, not clear, but I tried:
:~$ sudo nmcli dev connect wlp4s0 Error: Failed to add/activate new connection: A 'wireless' setting is required if no AP path was given.
So, it looks to me that if I can fix the "'wireless' setting" and connect wlp4s0 the problem may be fixed.
So, what are these settings and how to change them?