在基于VirtualBox的Oracle Linux上布署11G RAC，执行grid Infrastructure 集群件安装的时候，OUI界面显示不全，右下角缺少”next”与”cancel”按钮，显示如下
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点击”System”–>”Administrator”–>”Display”，将分辨率由640×480调整至800×600，然后logout重新登陆，问题依旧。
编辑/etc/X11/xorg.cnf文件，设置分辨率参数Modes，，显示如下
Section “InputDevice”Identifier “Keyboard[0]”Driver “kbd”Option “XkbModel” “pc105″Option “XkbLayout” “us”Option “Protocol” “Standard”Option “CoreKeyboard”EndSection
Section “InputDevice”Driver “mouse”Identifier “Mouse[1]”Option “Buttons” “9”Option “Device” “/dev/input/mice”Option “Name” “VirtualBox Mouse Buttons”Option “Protocol” “explorerps/2″Option “Vendor” “Oracle Corporation”Option “ZAxisMapping” “4 5″Option “CorePointer”EndSection
Section “InputDevice”Driver “vboxmouse”Identifier “Mouse[2]”Option “Device” “/dev/vboxguest”Option “Name” “VirtualBox Mouse”Option “Vendor” “Oracle Corporation”Option “SendCoreEvents”EndSection
Section “ServerLayout”Identifier “Layout[all]”InputDevice “Keyboard[0]” “CoreKeyboard”InputDevice “Mouse[1]” “CorePointer”InputDevice “Mouse[2]” “SendCoreEvents”Option “Clone” “off”Option “Xinerama” “off”Screen “Screen[0]”EndSection
Section “Monitor”Identifier “Monitor[0]”ModelName “VirtualBox Virtual Output”VendorName “Oracle Corporation”EndSection
Section “Device”BoardName “VirtualBox Graphics”Driver “vboxvideo”Identifier “Device[0]”VendorName “Oracle Corporation”EndSection
Section “Screen”SubSection “Display”Depth 24
Modes “1024×768” “800×600” “640×480″EndSubSectionDevice “Device[0]”Identifier “Screen[0]”Monitor “Monitor[0]”EndSection
然后重启系统，问题依旧，并且点击”System”–>”Administrator”–>”Display”，发现可选分辨率还是只有640×480和800×600。
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