Comment 23 for bug 1390628

I have same issue after upgrade 14.10 to 15.04 this morning. I cant see mouse pointer but mouse obvious working since I see when i go trough menus mouse hover state. I read this comments here and in my case killing gnome-session solve issue for that session. After rebooting issue is still here, but I can back mouse by killing session again... so I can work today until it will be fixed.