ArchLinux安装补充
安装xorg
pacman -S xorg
如果安装完成之后，仍然无法运行startx，则
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First, you will need the X server:
# pacman -Syu xorg-server
Install the xorg-xinit package if you want to start X without a display manager:
# pacman -S xorg-xinit
Optionally, install twm, xclock and xterm for the default xorg-xinit environment:
# pacman -S xorg-twm xorg-xclock xterm
You may also want the useful Xorg utilities:
# pacman -S xorg-utils xorg-server-utils
