HP 650笔记本内置WiFi芯片故障，Ubuntu 22系统切换使用WiFi dongle相关问题咨询

Hey there, let's work through your WiFi problem together. Sorry to hear your internal WiFi module failed—those hardware quirks can be super frustrating!

First, let's tackle how to get your system to ignore the broken internal module and use your WiFi dongle instead:

• Identify your internal WiFi device
  Run this command in the terminal to list all network interfaces:

  lshw -C network
  

  Look for the entry labeled Wireless interface that corresponds to your internal module (it’ll usually have a name like wlp2s0, while your dongle might start with wlx followed by a string of characters). Note down its name and driver module (if listed).

• Disable the internal module permanently
  You have two reliable ways to do this:

  1. Blacklist the driver:
     Edit the modprobe blacklist file with:

     sudo nano /etc/modprobe.d/blacklist.conf
     

     Add a line at the end like blacklist <your-internal-wifi-driver> (replace with the driver name you found earlier, e.g., blacklist iwlwifi). Save and exit, then update your initramfs to apply the change:

     sudo update-initramfs -u
     

     Reboot your system, and the internal WiFi driver won’t load anymore.
  2. Use a udev rule:
     Create a new udev rule file to disable the interface on boot:

     sudo nano /etc/udev/rules.d/99-disable-internal-wifi.rules
     

     Add this line (replace <internal-device-name> with the interface name you noted):

     SUBSYSTEM=="net", ACTION=="add", ATTR{name}=="<internal-device-name>", RUN+="/sbin/ip link set $name down"
     

     Save, exit, and reboot—your internal WiFi will stay disabled.

• Clear old WiFi settings
  To get rid of leftover saved connections that might be causing confusion:

  • Go to Settings > Network, find any old WiFi networks tied to your internal module, click the gear icon, and select Forget.
  • Or, if you want to wipe all saved network settings at once, run:

    sudo rm -rf /etc/NetworkManager/system-connections/*
    

    Just remember you’ll need to reconnect to your WiFi networks after doing this.

Now, about your question: What happens if I reinstall Ubuntu with the WiFi dongle attached?

This is totally safe and should work smoothly! When you run the installer with the dongle connected, Ubuntu 22.04 will detect it automatically (most common USB WiFi dongles have built-in driver support in this release). The installer will set up the dongle during installation, and once the OS is up and running, it should prioritize the dongle over the broken internal module. That said, it’s still a good idea to disable the internal module using the steps above afterward to avoid any potential conflicts or leftover settings messing things up.

备注：内容来源于stack exchange，提问作者redundant with recumbent