1.在桌面右件"新建终端"在终端中输入(务必注意大小写)：
cd /etc/X11
vi XF86Config
2.通过文件夹进入到/etc/X11中找到XF86Config，右件“打开方式/VI”
VI打开文件后找到如下内容：
修改内容如下: (要修改内容按“i”插入，修改完毕后按“ESC”然后再输入控制命令保存配置文件:wq)
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Unprobed Monitor"
HorizSync 31.5 - 37.9
VertRefresh 50.0 - 70.0 //把这里改为 60.0 - 80.0
Option "dpms"
EndSection
Section "Device"
Identifier "Videocard0"
Driver "radeon"
VendorName "Videocard vendor"
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1024*768" "800*600" //把后面的"800*600"去掉
EndSubSection
3.重启
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