RedHat Linux AS4.0 后花屏的解决方法-sdccf-ChinaUnix博客

在虚拟机上 RedHat Linux AS4.0 后，由于配置时选择颜色深度太高，把 16 位色配置为 24 位色，导致打开图形界面时出现，屏幕宽度非常大，严重变形，不能操作。

既然是显卡配置部分出现问题，就必须修改该部分的配置信息。在这种情况下，这些应该进入单用户模式下完成：

首先重新启动机器，在出现 grub 后，按字母“e”，然后会出现 grub 的配置文件，再按键盘移动光标到第二行“Kernal……”，再按“e”，然后在编辑界面输入 single，回车。然后按“b”重启，就进入了“单用户模式”。
进入后在提示符 # 后敲入：vi /etc/X11/xorg.conf，然后会打开这个视频配置文件，再输入“/Screen”(注意S是大写)检索到 Screen 部分，会显示相关的配置的地方。

然后您按“i”键进入Vi编辑器的插入模式，把光标移动到“24”的位置，把这里的 24 改为 16，然后按 ESC 键返回命令模式，按冒号“:”，输入 wq，回车，保存、退出。键入 reboot 命令，回车，重新启动，图形界面就出来了！

以下是一个正确的 xorg.conf 文件的内容：

# XFree86 4 configuration created by pyxf86config

    Section "ServerLayout"
    Identifier     "Default Layout"
    Screen      0 "Screen0" 0 0
    InputDevice    "Mouse0" "CorePointer"
    InputDevice    "Keyboard0" "CoreKeyboard"
    EndSection

Section "Files"

    # RgbPath is the location of the RGB database. Note, this is the name of the
    # file minus the extension (like ".txt" or ".db"). There is normally
    # no need to change the default.
    # Multiple FontPath entries are allowed (they are concatenated together)
    # By default, Red Hat 6.0 and later now use a font independent of
    # the X server to render fonts.
    RgbPath      "/usr/X11R6/lib/X11/rgb"
    FontPath     "unix/:7100"
    EndSection

    Section "Module"
    Load "dbe"
    Load "extmod"
    Load "fbdevhw"
    Load "glx"
    Load "record"
    Load "freetype"
    Load "type1"
    Load "dri"
    EndSection

Section "InputDevice"

    # Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
    # Option "Xleds"  "1 2 3"
    # To disable the XKEYBOARD extension, uncomment XkbDisable.
    # Option "XkbDisable"
    # To customise the XKB settings to suit your keyboard, modify the
    # lines below (which are the defaults). For example, for a non-U.S.
    # keyboard, you will probably want to use:
    # Option "XkbModel" "pc102"
    # If you have a US Microsoft Natural keyboard, you can use:
    # Option "XkbModel" "microsoft"
    #
    # Then to change the language, change the Layout setting.
    # For example, a german layout can be obtained with:
    # Option "XkbLayout" "de"
    # or:
    # Option "XkbLayout" "de"
    # Option "XkbVariant" "nodeadkeys"
    #
    # If you'd like to switch the positions of your capslock and
    # control keys, use:
    # Option "XkbOptions" "ctrl:swapcaps"
    # Or if you just want both to be control, use:
    # Option "XkbOptions" "ctrl:nocaps"
    #
    Identifier "Keyboard0"
    Driver      "kbd"
    Option     "XkbModel" "pc105"
    Option     "XkbLayout" "us"
    EndSection

    Section "InputDevice"
    Identifier "Mouse0"
    Driver      "mouse"
    Option     "Protocol" "IMPS/2"
    Option     "Device" "/dev/input/mice"
    Option     "ZAxisMapping" "4 5"
    Option     "Emulate3Buttons" "yes"
    EndSection

    Section "Monitor"
    Identifier   "Monitor0"
    VendorName   "Monitor Vendor"
    ModelName    "Unknown monitor"
    HorizSync    31.5 - 37.9
    VertRefresh 50.0 - 70.0
    Option     "dpms"
    EndSection

    Section "Device"
    Identifier "Videocard0"
    Driver      "s3"
    VendorName "Videocard vendor"
    BoardName   "S3 Trio64 (generic)"
    EndSection

    Section "Screen"
    Identifier "Screen0"
    Device     "Videocard0"
    Monitor    "Monitor0"
    DefaultDepth    16
    SubSection "Display"
      Viewport   0 0
      Depth     16
      Modes    "800x600" "640x480"
    EndSubSection
    SubSection "Display"
      Viewport   0 0
      Depth    16
      Modes    "800x600" "640x480"
    EndSubSection
    EndSection

    Section "DRI"
    Group        0
    Mode         0666
    EndSection

注意以上的 Section "Screen"……EndSection 部分，正是我们需要关心的地方。在实际中笔者发现，DefaultDepth 16 莫名其妙的变为了 DefaultDepth 16161616161616161616。SubSection "Display" 部分的两个 16 都变为了 24，需要全部变回来。这里表明是有 2 个显示器的情况。