I have noticed a strange phenomenon when I try to reboot my Ubuntu pc. I have a multi monitor configuration with a Radeon HD6870 graphic card and when I reboot my pc I can see at the start-up of the OS the images of the application previously used!
They are only pics like a wallpaper but few instants after these images disappear.
Why does this happens?
Updating: when the monitor turns on again I can see it to flicker with three horizontal bars. I have to turn the monitor off and back on in order to update the sync with the graphic card.