i have linux maybe for 6 months, i use Ubuntu. Recently i upgrade to version 11.10 (clean install) and i get very often this error - is not exactly the same, bat is it black screen and there is no another way then reboot computer manually. I can't find nothing, which caused this crash - it's really random.
Bat this error i get also on older Ubuntu installation (11.04) bat no so often...
There is screen of last error - http://ubuntuone.com/4igcOBokFapOHjhZLIdLhP