Comment 9 for bug 919321

Re-happened again listening a youtube video song on facebook's page.
I played the video then i scrolled down the page for reading others friends posts. After a while I scrolled up the page for watching the video, but all the screen became white and the audio went in a little loop. I tried to go on tty by pressing ctrl-alt-F1, but nothing happened. Then i tried to press the power botton to shut down the system like other times but it did nothing...