安裝完的 Ubuntu 14.04 桌面圖形介面反應很慢,降地顯示解析度會比較好一點,但是一樣很慢,還是先來看看我的 VGA 是哪一家的.

ben@benjr:~$
........
04:03.0  VGA compatible controller: Matrox Electronics Systems Ltd. MGA G200eW WPCM450 (rev 0a)

是 Matrox Electronics Systems Ltd. MGA G200eW

網路上查詢要設定 X11 但 X11 的設定檔放那裏？以前在 /etc/X11/xorg.conf ,但現在仔細看沒這一個檔,我們需要手動產生,執行 #Xorg -configure 就可以產生 xorg.conf 了!!!

ben@benjr:~$ sudo Xorg -configure
[sudo] password for ben:

X.Org X Server 1.15.1
Release Date: 2014-04-13
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.2.0-37-generic x86_64 Ubuntu
Current Operating System: Linux benjr 3.13.0-24-generic #47-Ubuntu SMP FrMay 2 23:30:00 UTC 2014 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=9b2707-26ae-4dcc-98a6-9706827cd952 ro quiet splash 

vt.handoff=7
Build Date: 16 April 2014  01:36:29PM
xorg-server 2:1.15.1-0ubuntu2 (For technical support please see http://www.ubuu.com/support)
Current version of pixman: 0.30.2
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Tue May  6 14:23:18 2014
List of video drivers:
        qxl
        ati
        intel
        sisusb
        mga
        r128
        radeon
        modesetting
        trident
        spiceqxl
        cirrus
        savage
        sis
        nouveau
        siliconmotion
        mach64
        tdfx
        vmware
        openchrome
        s3
        neomagic
        vesa
        fbdev
(++) Using config file: "/home/ben/xorg.conf.new"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"


Xorg detected your mouse at device /dev/input/mice.
Please check your config if the mouse is still not
operational, as by default Xorg tries to autodetect
the protocol.

Your xorg.conf file is /home/ben/xorg.conf.new

To test the server, run 'X -config /home/ben/xorg.conf.new'

(EE) Server terminated with error (2). Closing log file.

在 Xorg 指令執行後,家目錄會產生 xorg.conf 稍後我們再將檔案從 /home/ben/xorg.conf.new 複製到 /etc/X11 再進行編輯即可!

ben@benjr:~$ cp /home/ben/xorg.conf.new /etc/X11/xorg.conf

主要的設定參考了 xserver-xorg-video-mga 說明.

要注意的也只有

Section "Device"
        Identifier  "Card0"
        Driver      "mga"
        BusID       "PCI:4:3:0"
EndSection

我們來參考一下全部的內容

ben@benjr:~$ cd /etc/X11
ben@benjr:/etc/X11$ cat xorg.conf
Section "ServerLayout"
        Identifier     "X.org Configured"
        Screen      0  "Screen0" 0 0
        InputDevice    "Mouse0" "CorePointer"
        InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
        ModulePath   "/usr/lib/xorg/modules"
        FontPath     "/usr/share/fonts/X11/misc"
        FontPath     "/usr/share/fonts/X11/cyrillic"
        FontPath     "/usr/share/fonts/X11/100dpi/:unscaled"
        FontPath     "/usr/share/fonts/X11/75dpi/:unscaled"
        FontPath     "/usr/share/fonts/X11/Type1"
        FontPath     "/usr/share/fonts/X11/100dpi"
        FontPath     "/usr/share/fonts/X11/75dpi"
        FontPath     "built-ins"
EndSection

Section "Module"
        Load  "glx"
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
EndSection

Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Protocol" "auto"
        Option      "Device" "/dev/input/mice"
        Option      "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
        #DisplaySize      330   270     # mm
        Identifier   "Monitor0"
        VendorName   "LEN"
        ModelName    "LEN L171"
        HorizSync    30.0 - 83.0
        VertRefresh  55.0 - 76.0
        Option      "DPMS"
EndSection

Section "Device"
        Identifier  "Card0"
        Driver      "mga"
        BusID       "PCI:4:3:0"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        SubSection "Display"
                Viewport   0 0
                Depth     1
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     4
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     8
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     15
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     16
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection

將系統重開,冏 還是一樣慢! 是因為 Unity 的關係嗎??

解決方案

朋友 Danny 有找到解決方案,如下面連結
http://www.wikihow.com/Speed-Up-Unity-in-Ubuntu

在 Ubuntu 按 Ctrl+Alt + T 叫出 TERMINAL 然後編輯 .xprofile (圖形介面底下 啟始命令稿 initialization scripts,儲存在使用者的家目錄即可)

ben@benjr:~$ gedit .xprofile
export UNITY_LOW_GFX_MODE=1

重開機即可.

不過手邊沒有機器可以試.有機會再試試看了.