Hi there,
I have kubuntu 13.04 and recently i've made the update of some aplications and after that i only can login at the XBMC session, before this problem, i didn't even realized that i had a session for the XBMC.

So at the desktop environment i only can log in on this session, and i can't use the operating system, only the XMBC application

After that problem happened, i can change to the terminal mode (Ctrl+Alt+F1) at login and see if i could change the session or fix this problem, the thing is i can see the files that have the configuraton of the session, but i can't change them effectively.
for instance: i can see the session files on ~/.kde/share/config/sessions/ kmix and kwin and both seems to be ok.
at /var/lib/AccountsServices/users/ i can see my user file, and there, on the XSession parameter, there is XBMC. If i change this value and reboot my machine, nothing happens
at /usr/share/xsessions i can see both files: kde-plasma.desktop and XBMC.desktop, so i think that the solution would be to change the session on my user file, but even doing that, after a reboot, the file is changed to have the session XBMC.

How can i change the session effectively?

You could:

1) deinstall and purge xbmc
2) add a new user, login in his name and see whether the problem persists
3) rename ~/.kde while not logged in and see whether an ordinary session starts

Also, what exactly have you done? Is your kdm set to autologin?

Hi Toad,

Thank you for your answer, i will answer what i have done.
1) uninstall and purge XBMC is not a good option, because i use it and this program and i have several configurations that i don't want to do again.
2) Tested and did not worked.
3) Tested too, but the only session available was the XMBC

The problem apeared when i did the update to xbmc gothan 13.1.
i've tried to enter in recovery mode, and there do a dpkg recover broken packages, but none of that worked.

here goes an image of my login screen (there is a link because the forum can't determine the dimensions of the image):
http://i60.tinypic.com/e8o5j5.jpg
there is only one option of session

Can you check for the presence of a ~/.xinitrc file?

You could try to just move /usr/share/xsessions/XBMC.desktop away:

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sudo mv /usr/share/xsessions/XBMC.desktop /usr/share/XBMC.desktop

Then restart LXDM(?)

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sudo telinit 3; sleep 4; sudo telinit 5

To the first question: No i don't have an .xinitrc file on my profile

about the second option, moving the XBMC.desktop only removed the session from login screen, when i log in, the system seems to only authenticate and stays with wallpaper.

the command "sudo telinit 3; sleep 4; sudo telinit 5" did nothing that i have noted

telinit is the sysv way to change the runlevel - i was not aware that ubuntu switched to systemd?

what do you men "only removes the session" - can you now select a kde session?

While installing xbmc were any other packages removed? Have a look at /var/log/apt/history.log - if the Xbuntus have it, that is...

Can you please verify that all dependencies of the "kubuntu-desktop" package are installed?

bcooksley wrote:Can you please verify that all dependencies of the "kubuntu-desktop" package are installed?

how can i do that from the command line?

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sudo apt-get install --reinstall kubuntu-desktop

That way all the dependencies get pulled in again

As root, please run the following two commands and provide their output here:

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dpkg --audit
apt-get install kubuntu-desktop

Please note that if all is well, then "dpkg --audit" will return nothing.

toad wrote:

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sudo apt-get install --reinstall kubuntu-desktop

That way all the dependencies get pulled in again

Thank you very much Toad, that solved my problem.
Now i can choose the session that i want!

Coolio, enjoy your kubuntu