우분투 해상도 추가방법

How to change resolution.

/etc/X11/xorg.conf (create if not exist)

# 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    "Generic Monitor"
    HorizSync    30 - 71
    VertRefresh    50 - 160
EndSection

Section "Screen"
    Identifier    "Default Screen"
    Device        "Configured Video Device"
    Monitor        "Generic Monitor"
    DefaultDepth    24
   
    SubSection "Display"
       Modes   "1280x1024" "1440x900" "1280x960" "1360x768" "1024x768" "800x600"        
    EndSubSection

EndSection

restart gdm and go to Monitor configuration, voila!