video - http://youtu.be/TRx47TawfW4
This start to happen where often recently. while I'm watching a movie, or flash my video/display gets crash and the only solution is to reboot. I've experienced the same problem on Win7 but not so often like on Ubuntu 11.10 - 12.04 x64. Is this a driver issue or video card issue ?
ubuntu 12.04 x64 - ati radeon hd4570 - catalyst version 12.4