I had tested with a gnome-session, no issue... The problem happened only with unity...
After a purge of qt5ct , i have restart the session, the issue isn't go away... qjackctl start tray with original theme, but the double menu window is always here...
i have compile [939058 https://sourceforge.net/p/qjackctl/code/ci/93905827ca103b37ca0c88343a695bcc7f52244f/ ]: $ ./autogen.sh $ ./configure --enable-jack-version --enable-jack-midi . . . checking for qmake-qt5... no checking for qmake... /usr/bin/qmake checking for Qt major version... 5 checking for Qt install path... /usr/lib/x86_64-linux-gnu/qt5/bin checking for qmake... (cached) /usr/bin/qmake checking for Qt install headers... /usr/include/x86_64-linux-gnu/qt5 checking for Qt install libraries......
Hi Rui, No, this is always present.... I put a sreencast.... i'm on ubuntu 16.04
tray icon artefacts
Futur of the notification option