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How To Fix Disappearing Wifi and IP Address Issue in Ubuntu?

Ubuntu 18

In this article, we will delve into a common issue that Ubuntu users may encounter – the disappearance of Wi-Fi and IP address. This issue is characterized by the Wi-Fi interface not being visible in the Ubuntu settings menu, despite the fact that the interface is up and running. Additionally, the wireless options may disappear from the top left corner indicator.

This article will guide you through the process of diagnosing and resolving this issue.

Understanding the Issue

Before we dive into the solutions, it’s important to understand what’s happening. When this issue occurs, running the command sudo lshw -C network in the terminal shows that the Wi-Fi interface is active. However, the interface does not connect to any network and the wireless options are not visible in the settings menu or the top left corner indicator.

The command sudo lshw -C network is used to list all network devices. The -C flag is used to specify the class of the hardware, in this case, network.

Checking the NetworkManager Service

The first step in troubleshooting this issue is to check if the NetworkManager service is running. NetworkManager is a daemon that sits in the background and controls network connections on your computer.

You can check the status of the NetworkManager service by running the command sudo service NetworkManager status in the terminal.

If the NetworkManager service is not running, you can restart it by executing sudo service NetworkManager restart.

The service command is used to run a System V init script, in this case, NetworkManager. The status parameter is used to display the status of the service, while the restart parameter is used to stop and then start the service.

Checking for Error Messages

If the NetworkManager service is running but the issue still persists, you can try checking for any relevant error messages or information related to the wireless interface.

This can be done by running the command sudo dmesg | grep -e wlp -e iwl in the terminal.

The dmesg command is used to display the kernel ring buffer, which contains a log of system messages. The grep command is used to search for specific patterns in the output, in this case, wlp and iwl, which are related to the wireless interface.

Conclusion

The steps outlined above should help you diagnose and resolve the issue of disappearing Wi-Fi and IP address in Ubuntu. However, it’s important to note that these solutions may not resolve the issue in all cases, as the root cause can vary depending on the specific configuration and state of your system.

If you’re still experiencing issues after following these steps, you may need to consult additional resources or seek help from the Ubuntu community. The Ubuntu Forums and Ask Ubuntu are great places to start.

Remember, troubleshooting is a process of elimination. Keep trying different solutions and eventually, you’ll find the one that works for your specific situation. Good luck!

How do I check if the NetworkManager service is running in Ubuntu?

To check the status of the NetworkManager service, you can run the command sudo service NetworkManager status in the terminal.

How do I restart the NetworkManager service in Ubuntu?

If the NetworkManager service is not running, you can restart it by executing sudo service NetworkManager restart in the terminal.

How can I check for error messages related to the wireless interface in Ubuntu?

To check for error messages related to the wireless interface, you can run the command sudo dmesg | grep -e wlp -e iwl in the terminal. This will display any relevant information or error messages.

Are the solutions provided in this article guaranteed to resolve the issue in all cases?

No, the solutions provided in this article may not resolve the issue in all cases as the root cause can vary depending on the specific configuration and state of your system. However, they are common troubleshooting steps that have proven to be effective in many cases.

What should I do if I’m still experiencing issues after following these steps?

If you’re still experiencing issues after following these steps, it is recommended to consult additional resources or seek help from the Ubuntu community. The Ubuntu Forums and Ask Ubuntu are great places to start. Remember, troubleshooting is a process of elimination, so keep trying different solutions and seeking help until you find the one that works for your specific situation.

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