Comment 37 for bug 1546328

Disabling the system tray completely seems a bit of a backwards step.

Like you, I am no QT expert. Although it is on my to-do list to learn. So if anyone can help identify what makes Ubuntu Studio freeze if Qjackctl was minimised before upgrade, it would be appreciated.

Otherwise, uploading the debdiff version where Qjackctl is compiled with QT4 seems the best option for users. It works out of the box with no issues for the users, or funny visual stuff, and the QT4 libraries will still be available and installed for other applications anyway.