解决ubuntu每次启动屏幕都是最大亮度问题

进入系统后,先调整合适的亮度,然后查询该亮度的数值,
然后按下面步骤操作即可

$ cat /sys/class/backlight/intel_backlight/brightness 
976
$ sudo vim /etc/rc.local
 
#加上下面一行命令,下次开机的时候就会显示现在调整的亮度
echo 976 > /sys/class/backlight/intel_backlight/brightness

如果上面的无效,则把brightness换成actual_brightness
/sys/class/backlight/intel_backlight/actual_brightness