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Thread: Missing WiFi adapter on latest Kernel - Really new to Linux/Ubuntu

  1. #1
    Join Date
    Jul 2021
    Beans
    1

    Missing WiFi adapter on latest Kernel - Really new to Linux/Ubuntu

    I was trying to fix a video memory crashing issue and followed some online script I'm not even sure how to find again. Somehow following those instructions has broken my wifi adapter so my system doesn't see any network adapters at all. I finally found how to hit escape on boot and go into the Grub menu to load an old kernel and re-enable networking but it seems after I reboot it goes back to the newest kernal and no networking again. I have tried enabling networking when in the new kernel but nothing works. Any tips for a REALLY new person on how to fix my broken kernal (the latest)?

  2. #2
    Join Date
    Jun 2010
    Location
    London, England
    Beans
    Hidden!
    Distro
    Ubuntu Development Release

    Re: Missing WiFi adapter on latest Kernel - Really new to Linux/Ubuntu

    The WiFi adapter is not broken. I say that because when you log in to Ubuntu with the older kernel you get a WiFi connection to the hub and from there to the internet. Am I correct? Therefore, the WiFi adapter is still working.

    When running on the older kernel what did you do to re-enable networking? Please explain what you are doing. There are some commands to run that will give information. Please run the commands in both kernels for comparison and post the printouts in this thread

    Code:
    iwconfig
    Code:
    rfkill list
    There are other commands that might help. But they have to be found. It could be that you have switched off WiFi in Ubuntu with the newer kernel. We need a command that will switch it back on. There was a command that could switch networking on and off but its code is not installed by default in Ubuntu any more. Did you by any chance run a command to install something called ifupdown? And then did run ifdown as a command?

    Regards
    It is a machine. It is more stupid than we are. It will not stop us from doing stupid things.
    Ubuntu user #33,200. Linux user #530,530


  3. #3
    Join Date
    May 2010
    Beans
    1,589

    Re: Missing WiFi adapter on latest Kernel - Really new to Linux/Ubuntu

    Does the system have a make and model?

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