I have this problem too. I am running 14.10 but I already had the problem in 14.04
The update manager icon appears in the dash taskbar but clicking the icon never grings up the update manager window.
Plug-in in another screen make appears the window in the second screen.
I have this problem too. I am running 14.10 but I already had the problem in 14.04
The update manager icon appears in the dash taskbar but clicking the icon never grings up the update manager window.
Plug-in in another screen make appears the window in the second screen.
This bug is not fixed !