Application is not responding

In Gnome, you get a warning if an application takes too long to complete a task. This can be really annoying if you know that the application is just trying to do its job with the available resources. Gdebi, Zotero and SnapGene are some of the apps that frequently cause this timeout warning on my (rather slow) laptop. To let Gnome know to stop sending this disturbing notification (or at least make them much less frequent), you can increase the timeout like this:

gsettings set org.gnome.mutter check-alive-timeout 50000

If you want to check what is the current setting:

gsettings get org.gnome.mutter check-alive-timeout