Some focused windows do not appear on top of unfocused windows, including Dash and Launcher

[Michael Moorman]

Some programs, for example GIMP, which launch with multiple windows, will have one window that is below the others, even when it has focus, which does not change when the window is selected through alt+tab or super+w. This affects the Dash and Launcher as well, which are hidden by any windows currently present. Screenshots attached illustrate this problem.

[Michael Moorman (tensorpuddin)]

Here's another screenshot illustrating the problem with GIMP windows.

[Omer Akram (om26er)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please answer these questions:

* Is this reproducible?
* If so, what specific steps should we take to recreate this bug?

This will help us to find and resolve the problem.

[Michael Moorman (tensorpuddin)]

It is very irregular. I thought it had gone away for a time but it recently recurred, and went away after I closed all open programs. It seems to only happen if there are a lot of programs open at once, and I suspend and resume. I can't reproduce it though.

[Michael Moorman (tensorpuddin)]

I found out how to reproduce this effect in a different way.

1: Open two instances of program A which has an icon in the Launcher
2: Open one instance of program B. Program B should have focus
3. Right-click the icon for Program A, and click the top selection with the program name.

Now one of the windows will be focused, but not the one that is on top.

Tested with Nautilus and GNOME Terminal.

[Michael Moorman (tensorpuddin)]

I just upgraded to 11.10 beta 1, and can confirm that this still exists.

[Michael Moorman (tensorpuddin)]

It also affects the new alt+tab switcher in 11.10, making it appear underneath other windows.

This time, there wasn't really anything needed to reproduce it; it was going this way just after I logged in and hasn't quit.

[Omer Akram (om26er)]

Thanks for the bug report. This particular bug has already been reported and is a duplicate of bug 805087, so is being marked as such. Any further discussion regarding the bug should occur in the other report. Feel free to report any other bugs you may find.