====== If you can`t load GNOME ======

** error: configuration defaults for gnome pwer manager not installed correctly ...**

**Ошибка! Настройки конфигурации по умолчанию системы управления питанием Gnome ...**

1. The way to avoid this problem is to keep enough disk space for the system.

2. If you already have it just do:
   ctr-alt-f1 (or f2)
   sudo apt-get autoclean
   sudo apt-get autoremove
   sudo reboot
   
First one removes local repository, the second one removes depended packages if they not needed

3.  If it didn`t help then unistall some application or files you don`t need
    sudo apt-get remove something_large
    sudo rm something_large
    sudo apt-get autoremove
    sudo reboot

4. If you can`t get to the terminal, first enter your password in unworking window which you usually use to enter gnome, after that you can use step 1