como fazer a resolução 1440x900 do meu monitor funcionar?

[maehara-san]

tá aqui o meu arquivo xorg.conf:

# 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.
#
# 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 "InputDevice"
   Identifier   "Generic Keyboard"
   Driver      "kbd"
   Option      "XkbRules"   "xorg"
   Option      "XkbModel"   "abnt2"
   Option      "XkbLayout"   "br"
EndSection

Section "InputDevice"
   Identifier   "Configured Mouse"
   Driver      "mouse"
   Option      "CorePointer"
EndSection

Section "Device"
   Identifier   "Configured Video Device"
   Option      "UseFBDev"      "true"
EndSection

Section "Monitor"
   Identifier   "Configured Monitor"
EndSection

Section "Screen"
   Identifier   "Default Screen"
   Monitor      "Configured Monitor"
   Device      "Configured Video Device"
EndSection

Section "ServerLayout"
   Identifier   "Default Layout"
   Screen      "Default Screen"
EndSection

[Juniorx32]

Maehara, qual seu Ubuntu e qual sua placa de video?

Vc ja instalou o driver de video correto no seu ubuntu.
Se não, vá em Sistema > Administração > Drivers de hardware. Habilite o driver restrito, espere baixar e instalar, depois reinicie o pc.
Dependendo da versao do ubuntu, vc deverá ainda configurar o monitor (no 8.04) ou o xorg.conf (no 9.04).

Continue pesquisando!
Boa sorte!