compiz prevents mouse from using edgemost pixels

[dorphichinfa]

Binary package hint: compiz

When using Compiz in Ubuntu Gutsy, click's where the cursor is occupying a pixel on the very edge of the screen do not register.

When using Metacity, I can swing my mouse to the very bottom of the screen (on a pixel on the very edge) and click to open a window in the window list. (Hence making use of Fitt's law which says clickable areas that occupy many pixels in the corners or edges of the screen can be considered of infinite size - http://en.wikipedia.org/wiki/Fitt%27s_Law) Similarly, I can swing my mouse to the right and click to scroll the scrollbar in Firefox (when maximized), or swing it to the top left to open one of the menus.

However, I can't do this in Compiz because clicks when the cursor is on the very edge of the screen do not work, and applications possibly do not even know the cursor is there since scrollbars (eg. with Firefox) and buttons (eg. the window list) do not show the mouse-over/hover highlight. The corner pixels still work, however, so I can still easily click on the buttons/menu in the corners of the screen (Apps, Log Out, Trash, Show Desktop) but only by swinging the mouse to the cornermost pixel.

I'll attach a picture to illustrate the 'dead areas' of clicking when Compiz is being used.

[Matt Zimmerman (mdz)]

I see this as well, on Hardy.

[®om (rom1v)]

Same problem, I wanted to bugreport, until someone give me this bug number :)