Gui not working after system shut down unexpectedly (ubuntu 12.04)

Hi,

my machine shutdown unexpectively due to cable fault
when i start the machine.Graphical mode is not worked. only konsole has opened.
i tried "startx" command.

$startx unable to connect to x server server error server terminal with error

After then
I installed "apt-get install kde"
I getting blue screen not even that konsole mode.Blue screen with login options not root and sudo users.
I used recovery mode also.but its saying gnome not supported
I struggling with this. please give me any idea.
my remote server auth keys are there in this machine.

Thanks

Have you tried running file system check after the unexpected shutdown?

~# fsck /filesystem_partition

There should be no need to reinstall KDE if it was running before hand.

Thanks for reply

Now, i am able to use gui mode by using single user mode

# service kdm start # startx

But, by default, i not able to use gui mode and terminal mode.
Getting error

saned disabled /etc/default/saned

Stopping System V runlevel compatibility

then stucked

Thanks.

I hope somebody from the ubuntu corner will come in, I cannot figure out with assurance. Cases like that I usually clear off the garbage:

sudo find /var -iname \*kde\*\*cache\* | xargs rm -fr

and also

sudo find /tmp -iname \*.kde\* | xargs rm -fr

You may try delete the lock nodes at the /tmp:

sudo find /tmp -iname \*lock | xargs rm -f

Press Ctl+Alt+Del to reboot. It might work.

Hope that helps. Good luck.

Another test you could to, while logged into single user mode, is to create a new user. Then try logging in to regular mode as the new user. If the new user is able to log in and have functionality, odds are that one of the hidden dot-configuration files in your /home/[username] directory got scrambled in the mess.

You could try renaming one of them as root, then testing your login, and repeating until you identify the culprit. I'd start with the ones directly related to your desktop environment.

Alternatively, you could transfer your data to the new /home/[username] and go on with your life.