Description of problem:
Must Press 'ctrl+alt' to capture the cursor for VNC graphical guest
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Prepare a VNC guest without Tablet hardware.
2. Startup and login the guest's desktop.
3. Click the desktop and check the title of the guest is not changed.
4. Press "Alt+ctl".
After pressing "ctl+alt", the title of the guest window is changed to "Press Control_L+ALT_L to
relase pointer. xxxxx". And cursor is captured and cannot move out of the guest.
The cursor should be caputed by clicking the desktop of the guest in step 3.
And not captured by pressing "ctl+alt" in step4.
This doesn't occur on rhel7 host.
This is not a critical issue that will prevent users to use virt-manager. Closing as WANTFIX.