[root@localhost ~]# vim load_xrandr.py
# -.- coding:utf-8 -.-
__author__ = 'root'
 
import os
 
# 列出显示器及分辨率
getScreens = os.popen("""
    vgas=$(xrandr | grep " connected");
 
    [ $(echo "$vgas" | wc -l) -gt 1 ]  {
        for i in $(echo "$vgas" | awk '{print $1}');
        do
            echo $i
            xrandr | grep "$i connected" -A 1 | awk -F"x" '{print $1}' | tail -n 1 | sed "s/ //g"
        done
    }""").readlines()
 
# 处理换行符号
for i in range(len(getScreens)): getScreens[i] = getScreens[i].replace("\n", "")
 
# 比对出分辨率较大的显示器
if int(getScreens[1])  int(getScreens[3]):
    bigger = getScreens[2]
    little = getScreens[0]
else:
    bigger = getScreens[0]
    little = getScreens[2]
 
# 使用较大的显示器作为当前输出.
os.popen("xrandr --output %s --auto --output %s --off" % (bigger, little))

[root@localhost ~]# vim .bashrc
[ $(xrandr | grep " connected" | wc -l) -gt 1 ]  {
    /usr/local/Python-2.7.8/bin/python /root/load_xrandr.py
}