Ubuntu12.04 screen brightness adjustment method summary --- there is always one method for you

Ubuntu12.04 screen brightness adjustment method summary --- there is always one method for you

Today, I suddenly felt that the screen was very eye-catching and I wanted to modify it, but I didn't know how to modify it in linux. I planned to modify the configuration file. After a little girl clicks it, I don't need to modify the configuration file, the following describes my methods.
I feel that I should first set the initial value of the screen brightness after the computer is started in method 3, and then adjust it in combination with method 1 or method 2.
Method 1:
1. Select the configuration icon in the upper-right corner of the screen.
 
2. Select to configure System Settins...
 
3. Select Power in HardWare
 


4. Click the red Brightness Settings.
 


5. Okay. Just pull the Brightness.
 


I don't know what will happen after the restart. I just want to come back tomorrow. Ah, unfortunately, after the restart, the brightness is back. It seems that the configuration file has been modified.
Method 2:
1. Run the following command on the terminal: sudo vim/etc/default/grub.

2,
Find
GRUB_CMDLINE_LINUX = ""
Change
GRUB_CMDLINE_LINUX = "acpi_backlight = vendor"
Before Modification
 
After modification
 
Save the file.
3. Upgrade grub
Terminal: sudo update-grub
 


4. After restart, you can use Fn adjustment.
Method 3
1. Run the following command on the terminal: sudo vim/etc/rc. local.
 
2. Add the following content to the last line of the file: echo 5>/sys/class/backlight/intel_backlight/brightness
The value after echo is 0-10, corresponding to 0---100%, 5---50%
Before Modification
 


After modification
 


3. Just save and restart your computer.