Comment 2 for bug 1734817

Updating this report for Ubuntu 18.04.

I made a new install of Ubuntu 18.04 and switched to the Unity shell.

LibreOffice: can't use ALT+F to access the File menu. ALT+E (etc) work fine; just not ALT+F.

Terminal: nothing seems to allow me to enable the ALT+F etc mnemonics in Gnome Terminal. Seems to be a separate bug.

Synaptic: works perfectly; it is not integrated with the Unity menu.

Thunderbird: works perfectly; it is integrated with the Unity menu correctly.
Firefox: also works perfectly.

Rhythmbox: as with LibreOffice, all the shortcuts work except for ALT+F (the first menu is not responsive, even though the 'F' in 'File' is underlined, just as for LibreOffice.

Gedit: as for Rhythmbox, LibreOffice: ALT+F doesn't work.

Pluma: works fine, except that ALT+F menu appears in the wrong place!! Appears in the top-left corner of the window instead of near the menubar.

@kurshid-alam: note, all of these apps *DO HAVE* menubars, all of which *DO APPEAR* when I type ALT. The only issue here is whether the displayed mnemonics are actually enacted or not.

@kurshid-alam: This issue was not present in Ubuntu 16.04, so I don't think it can relate to the 5-year old patch that you mentioned.