Comment 0 for bug 843958

When using my laptop with an external monitor attached, Unity behaves in an unexpected manner. Below, is a basic outline of how I have my monitors set up using Gnome3's Display utility.

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| | -------------------------------------
| External Monitor (#1) || Laptop Screen (#2) |
| || |
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I'm not sure what the proper name for the menu/indicator bar that runs across the top of the screen is. Here, I refer to it as the Unity menu bar.

My problem is this - when using multiple monitors, with maximized applications, it is difficult to use the mouse to switch focus from one app to the other. In my mind, the Unity menu bar must act as both a menu bar and a traditional window title border when applications are maximized. In single screen mode, this works as I expect it to. For example, I can reach up to the Unity menu bar and drag down to de-maximize the window.

But, this pattern/metaphor seems to break down when using multiple monitors. Let's say I have Firefox maximized on #1 and Thunderbird maximized #2. I start by using Firefox. Thus, Firefox is the application in focus. As long as continue to interact with Firefox, everything behaves as I expect it to. The problem starts when I want to shift focus to Thunderbird running on #2. If I use Alt-Tab, everything works as expected because Unity properly understands that I have shifted focus to Thunderbird. But, if I use my mouse to switch focus, Unity's behavior is not logical. Let's say I drag my mouse from Firefox to Thunderbird and attempt to interact with the Thunderbird menu, which is in the top-left corner of #2. Because Firefox still has the focus, I can not immediately access Thunderbird's menus. The Unity menu bar stays blank. This is confusing, but not the end of the world. It gets worse when the user discovers that clicking on the Unity menu bar that is positioned above Thunderbird does not cause Thunderbird to obtain focus. In this situation, the idea that the Unity menu bar is a title bar and menu breaks down because I can not give Thunderbird focus using the maximized title bar. The only way to switch focus to Thunderbird involves selecting some non-functional chrome in the Thunderbird window. Once I have clicked on Thunderbird, it has the focus and the menus and title bar behave as expected.

This is similar to bug #716177 but the recent fixes don't seem to have the desired affect.

Metacity had the option to have focus follow the mouse. In most use cases, this is incredibly frustrating. But, when using maximized windows in dual monitor set ups, this is actually much more natural. Unity should have some way of detecting when it should switch gears and allow focus to follow mouse and when it should wait for a click to switch focus.

I hope this all makes sense.