Public bug reported: Screen freezes black and locks up randomly. Only a hard reboot will bring it back.
Several others on Ubuntu Forums have reported similar problems. Usually I have a fair amount of programs running when it happens. Memory issue? (I have 500 MB and don't run games or other memory hogs.) Computer is a Dell Notebook 640C running Dapper. ** Affects: xorg (Ubuntu) Importance: Untriaged Status: Unconfirmed -- Screen freezes black and locks up randomly https://launchpad.net/bugs/50501 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs