In Wi-Fi connection the IPv4 address is not assigned.

[stevef]

Before and after information might help.

While it is working, open a terminal session by pressing three keys 'Crtl' 'Alt' and 'T' together.

In the window that opens copy and paste these commands

Code:

inxi -Fxxxrz | tee ~/"$(date +"%Y_%m_%d_%T")-inxi-information.txt"

followed by enter and then

Code:

ifconfig -a | tee ~/"$(date +"%Y_%m_%d_%T")-ifconfig-information.txt"

followed by enter.

These will create a couple of text files prefixed with date and time in your home directory.
The text files should be the results of the commands.
You can review the information in them.  Copy the text from the files and paste it back into this thread so we can see how it looks when working.

When the fault happens, repeat the above commands to make new text files while it is not working. Post the information back.

If you can determine when it goes from a working state to a failed state, the logs around the time it fails may show what is happening.
After the fault has happened, open a terminal session and paste in this command

Code:

journalctl --since 08:00 --until 08:30 --no-pager | tee ~/"$(date +"%Y_%m_%d_%T")-journalctl.txt"

followed by enter.

Replace the 08:00 and 08:30 times with your local times so it captures a window around the time the problem occurred.  Again, this should produce a text file in your home directory from which you can copy the information to the thread.