I am a new user to ubuntu.
as i have installed the operating system ubuntu 12.04.
the problem i am facing is while working my system is suddenly hanged. i have no other option except restart.
it only happens if i add some appearances (like selecting best visual mode).
my system configuration is
1. dual core with 3.00Ghz
2. ram DDR 2 with 1.4gb
3. hard disk of 160 gb.
[no graphic card]