I'm having problems with Ubuntu since a couple of days. I have GNOME-compiz for the desktop configuration and windows effects (not a big deal, small changes).
When I use Google Chrome, and I enter mostly to YouTube to reproduce a video, sometimes in a matter of seconds, screen goes to black, but the sound keep going. Then I just close the laptop until the sound mutes, and then I reopen it again. But when I open the laptop, everything goes back normally, but for the exception that taskbar (upper and lower) of gnome and buttons like (switch off, date, WIFI) doesn't show. So the only thing to do is to press Ctrl+Alt+Super and close session.
How can I fix these problems of my laptop crushing in video on those times I open YouTube (This doesn't happen every times, just sometimes).