Diodon uses Ayantana Indicators https://github.com/AyatanaIndicators/libayatana-appindicator. I've never had to debug indicators as it always worked so not sure how to go about this.
This said it seems Mate makes some configuration changes in terms of indicator. I have found this https://github.com/ubuntu-mate/ubuntu-mate- settings/blob/master/usr/share/glib-2.0/schemas/30_ubuntu- mate.gschema.override#L46 Maybe comparing those settings between the two MATE desktop you have might reveal where the problem is. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1956212 Title: No Diodon applet in the Notification Zone To manage notifications about this bug go to: https://bugs.launchpad.net/diodon/+bug/1956212/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs