I'm using Lubuntu 11.10, though a little different with Ubuntu, they may be alike to some extent IMO. now I want to disable the splash screen and output verbose information in text mode when I shutdown the system in GUI. Can anyone give a hand to me? any help appreciated!
Have you tried just hitting escape when you shutdown? Perhaps even hitting it twice in some cases. Some distros use F2 or alt+F2 as well.
If that does nothing, either the key binding is different or that method will not work. Temporarily you can change the plymouths splash to off by restarting and hitting e to edit the grub command line, and then e again on the correct line, most likely the second line.
Here you would scroll all the way to the end with your right arrow key and remove all of these if they exist:
Another option is to shutdown manually fron terminal using one of the following:
a) to restart:
b) to shutdown:
c) to shutdown but stop the shutdown process allowing you to read the verbose output:
You can turn off the plymouth-splash using the following command:
check it out, have fun!