Missing Tray menu on Ubuntu #8043

I have tested the official gitian build from 0.12.1 on Ubuntu 16.04 as well as self-compiled on 15.04 and came to the same error-behavior: Clicking on the tray icon reveals no or an empty menu.

Could be an Qt upstream bug.

<img width="912" alt="bildschirmfoto 2016-05-11 um 21 41 27" src="https://cloud.githubusercontent.com/assets/178464/15194514/8a2d4a7c-17c3-11e6-8531-86d329e7646d.png"> <img width="1066" alt="bildschirmfoto 2016-05-11 um 20 28 23" src="https://cloud.githubusercontent.com/assets/178464/15194516/8a53b2f2-17c3-11e6-8ebf-66e19563b17f.png">

Works fine on fedora both with self-compiled and gitian releases.

Relevant comment: #7497 (comment)

I don't have a tray icon either on Ubuntu 16.04.

It looks like tray icons for individual applications are dying out. On windows 10 they are grouped together in a popup menu in the task bar. On MacOSX I'm fairly sure we already disable the tray as it is simply the docker icon.

Ubuntu prefers showing a few hardcoded groups like 'network', 'language', 'messages', 'sound', and so on. It should show them for 'legacy' applications though but support is clearly flaky. I don't see it as a very serious issue, the Bitcoin Core icon was an odd duck out anyhow with its brightly colored icon.

Looks like a problem with initial rendering the tray. You can solve this issue by first hiding it (Options/Window/Hide tray) and then showing it again. From now on the tray should render properly.

I believe this can be closed, since it should work on Ubuntu 17.10 and later.

Yes, having this bug on xenial is an annoyance, but pretty much an upstream bug, so I doubt we could do anything here.