[enhancement request] Resizing a semi-maximised window using the Alt+Mouse Middle Button drag should be possible.

After testing I have found that the problem only happens on the middle part of the semi-maximized window. If you for example alt+middle click on the left, right, upper or lower part of the semi-maximized window it is re-sizable.

added compiz as affects thought it could also be related to compiz-plugins-main package.

I believe this bug is invalid. Compiz is designed to ignore the clicks near the middle of the window because it can't possibly know which window edge you're trying to move.

The same bug on thinkpad x200s in Ubuntu 12.04 alpha 2

@vanvugt; this functionality works for 'restored' windows, it is just broken for 'semi-maximised' windows.

Sorry, I can't reproduce the bug in oneiric. Alt+middle button always resizes semi-maximized windows for me. But of course, you need to click in either the left or right third of the window for it to work. The resize plugin is designed to ignore the click if it occurs in the middle third, because that's ambiguous.

@Daniel see the video, I think John want to report that.

I see now. Your assumption that a window should be resizable while it is maximized is incorrect. A window is and should never be resizable in the dimension in which it is maximized. You need to restore the window first using the maximize button or by dragging it to unsnap it from the maximized position.

@vanvugt; performing this action (resizing a semi-maximised window vertically) should switch the window from the semi-maximised to the 'restored' state. So as soon as the user starts performing this action, the window ceases to be in the semi-maximised state.

OK, so this is really an enhancement request. I don't think that compiz' design has ever changed with respect to resizing maximized windows, yet...

For consistency, I think if we were to do this then you would have to apply the same rules to fully maximized windows. Since they are actually just semi-maximized windows in both dimensions.