"System problem detected" after every login but no reports in /var/crash

Solution 1:

The best advice would be find the problem and fix it,

Without determining the problem, you should be able to disable the popup, (but you would be better off finding th source of the "problem")

vim /etc/default/apport

# set this to 0 to disable apport, or to 1 to enable it
# you can temporarily override this with
# sudo service apport start force_start=1

enabled=1 # <-- Set this to 0

Or sudo systemctl stop apport.service to stop it (also could disable).

If you do want to try and find out what is causing the issue, you can insepect the logs, what I find useful and has helped me track down most errors:

Look for any service files that aren't starting correclty

systemctl --failed

Look through the journal of the current boot for any error messages

journalctl -p 3 -b