Sim, notebook com o chipset da Via, vou postar meu xorg.conf pra voce dar uma olhada e ver o que precisa colocar
# 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 "InputDevice"
Identifier "Synaptics Touchpad"
Driver "synaptics"
Option "SendCoreEvents" "true"
Option "Device" "/dev/psaux"
Option "Protocol" "auto-dev"
Option "HorizEdgeScroll" "0"
EndSection
Section "Device"
Driver "via"
Identifier "Configured Video Device"
Option "LCDPort" "DFP_HIGHLOW"
Option "DPMS"
Option "ActiveDevice"
EndSection
Section "Monitor"
Identifier "Generic Monitor"
Option "DPMS"
HorizSync 28-51
VertRefresh 43-60
EndSection
Section "Screen"
Identifier "Default Screen"
Device "Configured Video Device"
Monitor "Monitor"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x800"
Virtual 1280 800
EndSubSection
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Synaptics Touchpad"
EndSection
Section "Module"
Load "glx"
Load "dri"
Load "extmod"
EndSection
Section "DRI"
Group 0
Mode 0666
EndSection