fix brightness waking up from sleep/suspend

gistfile1.txt

For waking up from suspension, I create the following script /etc/pm/sleep.d/brightness:

```shell
#!/bin/sh
case "$1" in
    resume|thaw)
        echo 170 > /sys/class/backlight/intel_backlight/brightness
        ;;
esac
```

And the permission of the script is -rwxr-xr-x. This should also solve your problem.

But if the screen is dimmed, the brightness is set to maximum after recovering from the dimming.