I'm using two monitors with different resolutions, so KWin ends up having empty areas in the "big rectangle that fits both screens".
KWin doesn't prevent the mouse from entering these, so that for example a panel that's at the edge of a visible screen is not at teh edge of the "input rectangle", and thus much harder to hit.
One can also "lose" the mouse pointer in these areas, but that's much less of a problem in my daily work.
Steps to Reproduce:
- setup kwin with two screens, different resolutions
- move mouse into "invisible area"
Mouse moves into invisible area
mouse should stick to the edge of the visible area
In KDE 3, this worked fine.
> In KDE 3, this worked fine.
I remember I had that problem in KDE 3, but I probably was using multiple screens (multi head).
Ah, there is a program in playground/utils ("noenter") to avoid that.
This was considered a bug in X11 and got recently fixed there: