Resolucion de pantalla en linux - [SiS] 771/671 PCIE VGA

Hola a todos, hace unos dias decidi pasar mi Notebook bangho a Linux, pero me encontre con que solo me tomaba la resolucion 640x480 y 800x600

Busque por todos lados la solucion, hasta que logre encontrarla.

Lo que hay que hacer es modificar el xorg.conf que seguramente estara vacio. Para hacer esto, abrimos una terminal (CTRL + ALT + T) y tipeamos:

sudo gedit /etc/X11/xorg.conf

Se nos abrira un editor de texto y colocamos lo siguiente:

# xorg.conf (X.Org X Window System server configuration file)
    #
    # This file was generated by dexconf, the Debian X Configuration tool, using
    # values from the debconf database.
    #
    # Edit this file with caution, and see the xorg.conf manual page.
    # (Type "man xorg.conf" at the shell prompt.)
    #
    # This file is automatically updated on xserver-xorg package upgrades *only*
    # if it has not been modified since the last upgrade of the xserver-xorg
    # package.
    #
    # Note that some configuration settings that could be done previously
    # in this file, now are automatically configured by the server and settings
    # here are ignored.
    #
    # If you have edited this file but would like it to be automatically updated
    # again, run the following command:
    # sudo dpkg-reconfigure -phigh xserver-xorg
     
    Section "Device"
    Identifier "Configured Video Device"
    EndSection
     
    Section "Monitor"
    Identifier "Configured Monitor"
    Vendorname "Generic LCD Display"
    modelname "LCD Panel 1024x768"
    Horizsync 31.5-64.0
    Vertrefresh 56.0 - 65.0
    modeline "1024x768_60.00" 63.50 1024 1072 1176 1328 768 771 775 798 -hsync +vsync
    Gamma 1.0
    # modeline "640x480@60" 25.2 640 656 752 800 480 490 492 525 -vsync -hsync
    # modeline "800x600@56" 36.0 800 824 896 1024 600 601 603 625 +hsync +vsync
    # modeline "800x600@60" 40.0 800 840 968 1056 600 601 605 628 +hsync +vsync
    # modeline "1024x768_60.00" 63.50 1024 1072 1176 1328 768 771 775 798 -hsync +vsync
    # modeline "1280x800_60.00" 40.0 800 840 968 1056 600 601 605 628 +hsync +vsync
    EndSection
     
    Section "Screen"
    Identifier "Default Screen"
    Monitor "Configured Monitor"
    Device "Configured Video Device"
    EndSection

Con esto logre llevar mi resolución a 1280x768

Espero que les sirva!

Saludos!