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I searched the entire web and tried everything, but the wifi only works on liveusb mode, on the actual installation on the SSD, it does't even show the available networks.

I tried downloading the Intel AC 9462 firmware from Intel's website and copied it to /lib/firmware. Verified that the iwlwifi driver is being used but nothing works.

My notebook is a Dell Inspiron 14 5490, it does't have a ethernet cable connection.

Could someone please help me?

Edit:

sudo rfkill list && lspci -knn | grep Net -A3

0: hci0: Bluetooth
        Soft blocked: yes
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
00:14.3 Network controller [0280]: Intel Corporation Device [8086:02f0]
        Subsystem: Intel Corporation Device [8086:42a4]
        Kernel driver in use: iwlwifi
        Kernel modules: iwlwifi

Kernel: 5.3.0-40-generic

I managed to connect my smartphone using USB Tethering to get internet like @Gryu said, and executed the commands described in this post. Now the wifi is working, but sometimes it doesn't find my network, even if the notebook is right beside the router. I don't know if it's related, and I admit that I don't know what these commands actually do.

But either way, it's not ideal to have to have a smartphone everytime I do a fresh install to make the wifi work, any ideas of why this happened?

Daniel Miranda
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  • Could you share internet with your laptop using your phone's usb tethering? – Gryu Mar 06 '20 at 22:42
  • Please run sudo rfkill list && lspci -knn | grep Net -A3 then copy as text the results. Return here, click [edit], and paste the results as text into your question. Please do not use Add Comments. A USB3-Ethernet adapter could be helpful in getting you connected. FYI, the Intel AC9462 iwlwifi drivers are already in the kernel, all praise to Linus. – K7AAY Mar 06 '20 at 22:51
  • Are you running kernel version 5.3.0-40? Verify from the terminal: uname -r If so, reboot and at the GRUB menu, select an earlier kernel version than -40. Does your wireless work now? Welcome to Ask Ubuntu. – chili555 Mar 07 '20 at 16:27

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