Fix Xorg Font on Ubuntu

grep WW /var/log/Xorg.0.log

If Xorg.0.log look like:

[    21.358] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[    21.358] 	Entry deleted from font path.
[    21.358] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[    21.358] 	Entry deleted from font path.
[    21.358] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[    21.358] 	Entry deleted from font path.
[    21.358] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[    21.358] 	Entry deleted from font path.
[    21.358] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.

Solution:

sudo apt-get install xfonts-cyrillic 
sudo apt-get install xfonts-100dpi
sudo apt-get install xfonts-75dpi

After install xfonts, don’t forget update your new fonts:

sudo fc-cache -fv

Reboot and look back file Xorg.0.log!!!!