Mobile data without using hotpot through V2rayNG

 `{
  "log": {
    "loglevel": "warning"
  },
  "inbounds": [
    {
      "port": 10808,
      "listen": "0.0.0.0",
      "protocol": "socks",
      "settings": {
        "auth": "noauth",
        "udp": false,
        "ip": "0.0.0.0"
      }
    }
  ],
  "outbounds": [
    {
      "protocol": "freedom",
      "settings": {},
      "tag": "direct"
    }
  ],
  "routing": {
    "rules": [
      {
        "type": "field",
        "outboundTag": "direct",
        "domain": [
          "geosite:cn",
          "geosite:geolocation-!cn"
        ],
        "ip": [
          "geoip:cn",
          "geoip:!cn"
        ]
      }
    ]
  }
}`

Note that you need to switch from a profile that connects to a remote server to prevent the auto-shutdown of the above profile, because if it is activated first, V2rayNG will still try to connect to a server(null) that doesn't exist and report errors. 

The intermediate WIFI need to be connected with auto-reconnect feature on. Forget the WIFI and manually reconnect it until mobile data can be used when the internet of WIFI is not available.

Ubuntu 22.04 boots to a black screen

`Ctrl+Alt+F2` -> login

1.  `cd /etc/gdm3`
     `sudo nano custom.config` -> Uncomment this line: `WaylandEnable=false`
     `reboot` or `sudo systemctl reboot`

2.  Try `sudo apt-get autoremove` or `lspci -nn | grep -E 'VGA|Display'`
     `sudo ubuntu-drivers autoinstall`

3. `sudo apt install --reinstall gdm3 ubuntu-desktop gnome-shell`