20寸显示器的标准分辨率是1680*1050

进入到/boot/grub/目录下，然后就可以看到里面有个名为menu.lst的文件，用vim将其打开，可以看到以下内容：

# grub.conf generated by anaconda

#

# Note that you do not have to rerun grub after making changes to this file

# NOTICE: You have a /boot partition. This means that

# all kernel and initrd paths are relative to /boot/, eg.

# root (hd0,0)

# kernel /vmlinuz-version ro root=/dev/hda2

# initrd /initrd-version.img

#boot=/dev/hda

default=0

timeout=5

gfxmenu (hd0,0)/message

title RedFlag (2.6.22.6-1)

root (hd0,0)

kernel /vmlinuz-2.6.22.6-1 ro root=LABEL=/ vga=788 splash=silent

initrd /initrd-2.6.22.6-1.img

其中这个vga=788就是控制你的分辨率与色彩模式的，你可以把它改成你的显示器支持的你喜欢的任意模式。数字对应的含义如下：

色深

640×480 800×600 1024×768 1280×1024

256

769 771 773 775

15位 784 787 790 793

16位 785 788 791 794

24位 786 789 792 795

改变数值后保存，然后重启。

Memory Range: 0xe0000000-0xe076ffff (rw)

Mode 0x0360: 768x480 (+768), 8 bits

Mode 0x0361: 768x480 (+1536), 16 bits

Mode 0x0362: 768x480 (+3072), 24 bits

Mode 0x0363: 960x600 (+960), 8 bits

Mode 0x0364: 960x600 (+1920), 16 bits

Mode 0x0365: 960x600 (+3840), 24 bits

Mode 0x0366: 1280x800 (+1280), 8 bits

Mode 0x0367: 1280x800 (+2560), 16 bits

Mode 0x0368: 1280x800 (+5120), 24 bits

Mode 0x0369: 1440x900 (+1472), 8 bits

Mode 0x036a: 1440x900 (+2880), 16 bits

Mode 0x036b: 1440x900 (+5760), 24 bits

Mode 0x036c: 1680x1050 (+1728), 8 bits

Mode 0x036d: 1680x1050 (+3392), 16 bits

Mode 0x036e: 1680x1050 (+6720), 24 bits

Mode 0x0307: 1280x1024 (+1280), 8 bits

Mode 0x031a: 1280x1024 (+2560), 16 bits

Mode 0x031b: 1280x1024 (+5120), 24 bits

Mode 0x0305: 1024x768 (+1024), 8 bits

Mode 0x0317: 1024x768 (+2048), 16 bits

Mode 0x0318: 1024x768 (+4096), 24 bits

Mode 0x0312: 640x480 (+2560), 24 bits

Mode 0x0314: 800x600 (+1600), 16 bits

Mode 0x0315: 800x600 (+3200), 24 bits

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