Translated message

A translation of this page exists in English.

解像度を 800x600 より大きくすることができません

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5

Issue

  • システム、詳細設定、ディスプレイツールで、実際の解像度が 800x600 より高い場合に、800x600 より高い解像度を設定することができません。これにより、ハードウェア認証テストの VIDEO セクションが失敗します。なぜなら、これには 1024x768 @ 24 bpp が最低解像度および色深度を設定する必要があるからです。

Resolution

この問題を回避するには、以下のいくつかの方法を試すことができます。

  • パラメータ "resolution=1024x768" を grub.conf のカーネル行に追加します。
  • パラメータ "video=1024x768" を grub.conf のカーネル行に追加します。
  • 以下の xorg.conf ファイルを修正して使用すると、ハードウェア認証に必要な 1024x768 解像度を設定することができます。xorg.conf を作成するには、How to create "xorg.conf" to configure X Windows on a system with no prior X configuration ? を参照してください。
    # This xorg.conf file has been designed for systems that support a resolution
    # of 1024x768 or greater, but only lower resolutions are listed in the
    # computer's System, Preferences, Display application.It assumes that X works
    # at low resolutions.It will allow you to achieve the 1024x768 resolution 
    # necessary for hardware certification purposes if you save it as xorg.conf,
    # place it in the /etc/X11 directory and restart X. Please read the other 
    # comment lines in this file and follow their directions to prepare the 
    # file for use. 
    
    Section "Monitor"
         Identifier   "Monitor0"
         ModelName    "LCD Panel 1024x768"
    # The HorizSync and VertRefresh lines below are designed for a generic LCD
    # monitor.They should also work for modern CRT monitors.If you know your 
    # monitor's values, replace the ones shown below with those values. 
    # Otherwise, uncomment the next two lines and use them as-is.
    #     HorizSync    31.5 - 48.0
    #     VertRefresh  56.0 - 65.0
         Option         "dpms"
    EndSection
    
    Section "Device"
         Identifier  "Videocard0"
    # The Driver line below should contain the appropriate driver for your system.
    # You can find your driver by looking at the system's /var/log/Xorg.0.log file
    # for lines that begin with driver names, like these:
    #
    # This is an example of a system using the Matrox 'mga' driver
    # (II) MGA(0): initializing int10
    # (II) MGA(0):Primary V_BIOS segment is:0xc000
    # (II) MGA(0):VESA BIOS detected
    # (II) MGA(0):VESA VBE Version 3.0
    #
    # This is an example of a system using the Aspeed 'ast' driver
    # (II) AST(0): initializing int10
    # (II) AST(0):Primary V_BIOS segment is:0xc000
    # (II) AST(0):VESA BIOS detected
    # (II) AST(0):VESA VBE Version 3.0
    # 
    # Replace the 'vesa' on the Driver line below (unless you are using the vesa 
    # driver) with the proper driver for your system and then uncomment the line.
    #     Driver      "vesa"
    EndSection
    
    Section "Screen"
         Identifier "Screen0"
         Device     "Videocard0"
         Monitor    "Monitor0"
         DefaultDepth     24
         SubSection "Display"
              Viewport   0 0
              Depth     24
         EndSubSection
    EndSection
    

This solution is part of Red Hat’s fast-track publication program, providing a huge library of solutions that Red Hat engineers have created while supporting our customers. To give you the knowledge you need the instant it becomes available, these articles may be presented in a raw and unedited form.