I don't know why but when I power up my system Ubuntu starts very slow and after waiting for 15 minutes it only gives me the terminal.. If then I power it down, and turning the computer back on it boots normally.
Here is an example of a normal boot: http://uppix.net/8/e/f/d16b07381b7cc3473572554211075.png
And this is the unusual boot: http://uppix.net/9/6/2/8a5dd533046bda79958c6ace8c533.png
Any help on how to fix this?
My system: 2gh centrino 2, 4gb Ram, 9650 Nvidia m GT.