I just simply wrote sudo apt-get install qtcreator
in terminal and saw how he removing xserver and some graphical packages in installation process.
At the end, he install them again, but after reboot, lightdm (desktop service) don't want to start (blank screen).
What I need to do, to fix that?
Tried to reinstall lightdm but doesn't help.
sudo startx
black screen appear again for about 1 minute. When it's back to terminal, the last info is:xinit: connection to the xserver lost
sudo start lightdm
3: if you have lost all hope connect to an external drive and copy all your data, then reinstall xubuntu. However you probably tried this, so really, i have no more ideas.