DELL D420笔记本主板是Intel945，集成GMA950显卡，安装完RHEL5/5.1后，分辨率保持在1024X768，无法填满1280X800的屏幕，于是（确保在root权限下安装）

1.修正/etc/X11/xorg.conf ；查看类似下面的一段；

QUOTE:

Section "Screen" Identifier "Screen0" Device "Videocard0" Monitor "Monitor0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 Modes "1280x800" EndSubSection EndSection

添加的内容

2.下载915resolution软件包。
到 http://atrpms.net/dist/el5/915resolution/ 下载915resolution-0.5.2-5.0.el5.i386.rpm 然后在图形界面下右键选择 用包管理器安装，自动安装完成

3.用915resolution列出vbios的模式：用 -l参数；

QUOTE:

# 915resolution -l 915resolution version 0.4, by Alain Poirier Chipset: 915GM (id=0x35808086) VBIOS type: 2 VBIOS Version: 3360 Mode 30 : 640x480, 8 bits/pixel Mode 32 : 800x600, 8 bits/pixel Mode 34 : 1024x768, 8 bits/pixel Mode 38 : 1280x1024, 8 bits/pixel Mode 3a : 1600x1200, 8 bits/pixel Mode 3c : 1920x1440, 8 bits/pixel Mode 41 : 640x480, 16 bits/pixel Mode 43 : 800x600, 16 bits/pixel Mode 45 : 1024x768, 16 bits/pixel Mode 49 : 1280x1024, 16 bits/pixel Mode 4b : 1600x1200, 16 bits/pixel Mode 4d : 1920x1440, 16 bits/pixel Mode 50 : 640x480, 32 bits/pixel Mode 52 : 800x600, 32 bits/pixel Mode 54 : 1024x768, 32 bits/pixel Mode 58 : 1280x1024, 32 bits/pixel Mode 5a : 1600x1200, 32 bits/pixel Mode 5c : 1920x1440, 32 bits/pixel Mode 7c : 1280x768, 8 bits/pixel Mode 7d : 1280x768, 16 bits/pixel Mode 7e : 1280x768, 32 bits/pixel

然后运行915resolution，把Mode54的1024X768＠32（当前分辨率）改成1280X800

＃915resolution 54 1280 800

分辨率立即就会变成1280X800＠32bit。但是重启后还是1024X768的分辨率

4.自动在开机时加再915resolution调整分辨率

编辑 /etc/rc.d/rc.local 文件，添加
915resolution 54 1280 800

保存重启，就可在登录界面时获得1280X800的分辨率。