The only possible way this could happen is that the video card is not being reset during a reboot so when X starts it shows the old contents of the FB. I don't believe this is a lightdm or unity-greeter issue. Those programs have no visibility to what is on your desktop when you restart. Moving back to ATI.
** Package changed: unity-greeter (Ubuntu) => xserver-xorg-video-ati (Ubuntu) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/927051 Title: On bootup, 'screenshot of shutdown' flashes up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/927051/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp