I installed Ubuntu 24.04 on my computer.
Problem: After the computer is turned on and used for a while, a reminder "Activation of network connection failed" will appear. Then, the wifi logo in the upper right corner will disappear, and no wifi can be searched in the settings.
Attempted solution: I tried restarting NetworkManager (sudo service NetworkManager restart), but it didn't work. Only restarting the computer can solve this problem.
Log: I used journalctl to capture the log when the problem occurred, which was about jun 30 16:45 ~ 16:55. I read the log, although I don't understand it very well, but the problem probably occurred around 16:49:22. Here is the link to the log: Google doc
Please help me find the cause of the problem based on the log and recommend a solution to me, thank you very much!