備份 Ubuntu 9.10 設定垂直排列雙螢幕, 兩顆螢幕都是接在同一張顯示卡,小螢幕在上, 大螢幕在下, 小螢幕解析度 1024x768 接 VGA output, 大螢幕解析度 1280x1024 接 DVIoutput, 另外有使用 gnome GUI 工具調整螢幕設定，或是 xrandr 指令, 以介面來區分:
xrandr --output VGA-0 --mode 1024x768 --output DVI-0 --mode 1280x1024 --below VGA-0
xorg.conf 中各個 section 定義
Monitor -> 螢幕
Device -> 顯示卡
Screen -> 顯示卡跟螢幕透過 VGA/DVI 介面的組合, 所以至少要有跟螢幕同等數目的 Screen 設定, virtual display設定到 2048x2048 可塞下多螢幕的解析度
xorg.conf 檔案
Section "Monitor"
#DisplaySize 300 230 # mm
Identifier "VGA Monitor"
VendorName "SAM"
ModelName "SyncMaster"
HorizSync 30.0 - 60.0
VertRefresh 56.0 - 75.0
Option "Position" "0 0"
Option "DPMS"
EndSection
Section "Monitor"
#DisplaySize 300 230 # mm
Identifier "DVI-0 Monitor"
VendorName "SAM"
ModelName "SyncMaster"
HorizSync 30.0 - 60.0
VertRefresh 56.0 - 75.0
Option "Position" "0 768"
Option "DPMS"
Option "Below" "VGA Monitor"
EndSection
Section "Device"
Identifier "Card0"
Driver "ati"
VendorName "ATI Technologies Inc"
BoardName "RV370 5B60 [Radeon X300 (PCIE)]"
BusID "PCI:5:0:0"
Option "monitor-VGA-0" "VGA Monitor"
Option "monitor-DVI-0" "DVI Monitor"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "VGA Monitor"
SubSection "Display"
Depth 24
# Modes "1024x768"
Virtual 2048 2048
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Card0"
Monitor "DVI Monitor"
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768"
EndSubSection
EndSection
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" 0 768
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
