QEMU can grab the mouse cursor on X11, to let the guest VM have full control over the pointer. This does not function under a Wayland session (QEMU running under XWayland). EXPECTED: QEMU grabs the cursor; the cursor cannot leave the QEMU window. RESULT: QEMU gets all cursor events from X11 apps, but the cursor can leave the QEMU window and navigate freely, often making guest OSes unusable due to being unable to do mouse input.
*** This bug has been marked as a duplicate of bug 455159 ***