Ubuntu12.04 automatically sets the screen brightness upon startup

After Ubuntu12.04 is installed, it is found that the screen is the maximum brightness every time it is set. It is very troublesome to set the brightness every time, so I searched for a solution on the Internet, but I tried to find a solution, still cannot solve the problem. Through your own exploration, you can finally set the brightness automatically after the boot. The following is a brief description of the solution for Ubuntu users with the same problem. :) Ubuntu12.04 automatic brightness setting method: 1. Open the Software Center and install the laptop-mode package; 2

After Ubuntu 12.04 is installed, it is found that the screen is the maximum brightness every time it is set. It is very troublesome to set the brightness every time, so I searched for a solution on the Internet, but I tried all the methods I could find, still cannot solve the problem.

Through your own exploration, you can finally set the brightness automatically after the boot.

The following is a brief description of the solution for Ubuntu users with the same problem. :)

How to automatically set the brightness when Ubuntu 12.04 is started:

1. Open the Software Center and install the laptop-mode package;
2. open the file:/etc/laptop-mode/laptop-mode.conf
Change the following flag to 1:
ENABLE_LAPTOP_MODE_ON_AC = 1
Save the file;
3. open the file:/etc/laptop-mode/conf. d/lcd-brightness.conf
Modify the following lines:
CONTROL_BRIGHTNESS = 1

BATT_BRIGHTNESS_COMMAND = "echo 3"
LM_AC_BRIGHTNESS_COMMAND = "echo 3"
NOLM_AC_BRIGHTNESS_COMMAND = "echo 3"
# BRIGHTNESS_OUTPUT = "/proc/acpi/video/VID/LCD/brightness"
BRIGHTNESS_OUTPUT = "/sys/class/backlight/acpi_video0/brightness"

Save the file;

4. Run the sudo update-grub command;

5. Restart the machine.

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