Solucionar poroblema de video
sudo dpkg-reconfigure xserver-xorg
sudo vim /etc/X11/xorg.conf
# x11-driver-video-sisimedia
Section "Device"
Identifier "Vesa"
Driver "vesa"
Screen 0
EndSection
Section "Monitor"
Identifier "Samsung"
Option "PreferredMode" "1024x768"
Gamma 1
EndSection
Section "Screen"
Identifier "Default Screen"
Device "Vesa"
Monitor "Samsung"
DefaultDepth 24
SubSection "Display"
Virtual 1024 768
Depth 24
Modes "1024x768@60"
EndSubSection
EndSection
Section "ServerFlags"
Option "IgnoreABI" "True"
EndSection
~
sudo /etc/init.d/lightdm restart