索尼SZ系列筆記本有一個獨特的功能，那就是雙顯卡切換功能，該系列均有兩塊顯卡，速度模式；nvidia獨立顯卡，耐力模式； intel集成顯卡，用戶可以跟據自己使用環境來選擇相應的模式，以保證電池使用的時間和筆記本的性能，這是一個非常人性化的設計。然而如何在 Ubuntu Linux來使用這個功能呢？我與大家分享一下。
我的筆記本本為索尼SZ 65 , OS為Ubuntu 8.04 64bit,在安裝系統時使用speed模式。
安裝完成之後安裝nvidia顯卡驅動：
wget http://us.download.nvidia.com/XFree86/Linux-x86_64/96.43.07/NVIDIA-Linux-x86_64-96.43.07-pkg2.run
如果是32bit應該是這個，
wget http://us.download.nvidia.com/XFree86/Linux-x86/96.43.07/NVIDIA-Linux-x86-96.43.07-pkg1.run
sudo apt-get install build-essential
sudo /etc/init.d/gdm stop
alt+ctrl+f1
輸入用戶名 密碼 進入
sudo sh 剛才您下載的文件名.run
然後一步一確定就可以了
sudo /etc/init.d/gdm start
進入x系統之後
sudo nvidia-settings
調整分辨率 保存
sudo gedit /etc/default/linux-restricted-modules-common
將其中的DISABLED_MODULES=”"改為DISABLED_MODULES="nv nvidia_new"。如果不這麼修改，重新啟動以後，驅動就會失敗
speed模式nvidia顯卡驅動安裝完成。
安裝intel顯卡：
sudo apt-get install xserver-xorg-video-intel
安裝完成，
speed模式的xorg.conf將其保存為/etc/X11/xorg.conf.speed
可以復制以下內容保存為xorg.conf.speed
# 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" "pc105"
Option "XkbLayout" "us,am"
Option "XkbOptions" "grp:alt_shift_toggle,grp_led:scroll"
Option "XkbVariant" ","
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"
Identifier "Configured Video Device"
Driver "nvidia"
Option "NoLogo" "True"
EndSection
Section "Monitor"
Identifier "Configured Monitor"
EndSection
Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
Defaultdepth 24
EndSection
Section "ServerLayout"
Identifier "Default Layout"
screen "Default Screen"
Inputdevice "Synaptics Touchpad"
EndSection
Section "Module"
Load "glx"
EndSection
