Recently, after booting the window appears "System Problem Detected" - and I choose "Report problem". So how can I find out what actually is the problem? Otherwise everything works as expected. Xubuntu 18.04 on HP15 laptop.
The "System Problem Detected" popup usually means that a crash occured.
The apport application listens for crashes. When one occurs, it constructs a .crash file in /var/crash with plenty of details for bug triagers to understand how and why the crash occurred.
Look in /var/crash for the .crash file to learn the cause. It's an ordinary text file - you can open it in any text editor.
The "System Problem Detected" popup usually means that a crash occured.
The apport application listens for crashes. When one occurs, it constructs a .crash file in /var/crash with plenty of details for bug triagers to understand how and why the crash occurred.
Look in /var/crash for the .crash file to learn the cause. It's an ordinary text file - you can open it in any text editor.