Resolution of the default maximum brightness for each reboot system under Ubuntu 14.04

A burst of notebook replaced win10 after a variety of not adapt, a variety of needs not satisfied, so rage, changed the ubuntu14.04, the results found that the screen brightness each boot is the most bright degree, by its annoyance, so online search for relevant solutions.

The process is as follows:

1. Terminal Input Code: (Opens the default grub profile, which has the option to set the screen brightness)

sudo gedit/etc/default/grub

2. Locate the following statement in the Open file: (the statement is used to set the selection of the background brightness)

Grub_cmdline_linux= ""

3. Change it to the following statement:

Grub_cmdline_linux= "Acpi_backlight=vendor" (choose background brightness of vendor type)

4. Save after changing.

5. Upgrade Grub:

sudo update-grub

Re-start the ... You can adjust the brightness by pressing FN.

By the end of this step, the process of setting the default screen brightness value starts below.

Used to set the brightness initial value:

1. Terminal Input Code:

sudo gedit/etc/rc.local

2. Add a line (before exit 0) to the Open file code:

echo >/sys/class/backlight/intel_backlight/brightness

Ps:500 refers to the brightness value of the screen, you can first view the screen's maximum brightness value, and then set the default screen brightness value here as needed.

The commands for querying screen brightness are: sudo cat/sys/class/backlight/intel_backlight/brightness or sudo cat/sys/class/backlight/intel_backlight /max_brightness

3. Then save it.

After the above method, you can adjust the screen brightness, and the restart will not change the brightness value you set.

Resolution of the default maximum brightness for each reboot system under Ubuntu 14.04