I also have the same problem since I upgraded to Feisty (re-installation) : sometimes, when I watch a video with Videolan, Ubuntu totally freezes, nothing works more (mouse, keyboard...), the only solution is to reboot with reset button.
My computer : CPU Athlon 64 4000 / Motherboard ASUS A8N-SLI SE / Graphic Card ATI Radeon X1300
Hello,
I also have the same problem since I upgraded to Feisty (re-installation) : sometimes, when I watch a video with Videolan, Ubuntu totally freezes, nothing works more (mouse, keyboard...), the only solution is to reboot with reset button.
My computer : CPU Athlon 64 4000 / Motherboard ASUS A8N-SLI SE / Graphic Card ATI Radeon X1300
All the remaining works fine, except this freeze.