We already know that in Ubuntu, from Ubuntu version 12.04 it will be enabled by default the Apport Error Reporting service from boot, thus displaying error messages from time to time when something has happened in the distribution. Possibly, these errors help us to know if something is happening in our distribution, but perhaps other users find them annoying and do not want to see them. For both we have a solution with this simple tutorial ...
Pop-ups not only report the problem that has occurred, they also serve to report the problem to developers and that they obtain relevant information about what happened in order to debug the system. Not all report the error, in fact, due to the large number of users in Ubuntu, it is probably not much use to report it, because there are already many other users who have previously reported it and are already working on it.
In most cases, does not mean that the Canonical system is serious or that it will not work, but are simply informational messages, and the system continues to function properly. Also, if you want to reduce the amount of this type of messages, I advise you to always keep the system updated. That does not guarantee that they will not appear, but at least, those bugs that have been corrected with patches will no longer haunt you ...
Well, whether you want to enable it because you have disabled it in the past and do not remember how to start it again, or if you want to say goodbye to it and not have these messages skipped again, you can manipulate Apport Error Reporting from the terminal:
For enable it:
sudo service apport start
For disable it:
sudo service apport stop
Remember that you can also do it with systemctl from systemd. If you want me to disable from boot, that is, when you start again it will not be active again:
sudo nano /etc/default/apport
And once we have the file open with the editor, we change the line "enabled = 1" to "enabled = 0". And it will be permanent once we save the changes with Control + X and Y.