Locking the screen (screensaver) would also get you a completely white screen. You can unlock it by typing your password blindly ...
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/729979 Title: Windows sometimes become blank/transparent when changing focus to them in natty -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs