I get this also, with 14.10 LTS as a host and 14.04 as a VirtualBox guest. My solution is to programmatically minimise VB by selecting another TTY (via Ctrl-Alt-F1) and running this script:
WID=`DISPLAY=:0 xdotool search --name "\[Running\]"` DISPLAY=:0 xdotool windowminimize $WID That gets the window ID of the VB window and then minimises it. I then Ctrl-Alt-F7 back to the desktop, click on the sound/clock menu or something (it seems to free up the focus) and then the password field will work again. It's a faff, but at least it works. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1305586 Title: Lock screen is unusable when some windows have a keyboard/mouse grab To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1305586/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs