5 Configuring System
ED-HMI2120-101C User Manual 5-42
Steps:
1. Execute the following command to enter the /sys/class/backlight directory.
cd
/sys/class/backlight
2. Execute the following command to display the files in the directory.
ls
3. Execute the following command to enter the panel_backlight folder.
cd panel_backlight
4. Execute the following command to display the files in the folder.
ls
5. Execute the following command to view the value of max_brightness, which is the maximum
brightness.
cat max_brightness
6. Execute the following command to view the value of brightness, which is the current
brightness.
cat brightness
7. Execute the following command to set the value of brightness.
echo y | sudo tee brightness
y indicates the brightness value that you need set. If the value of max_brightness is x, the
brightness adjustment range is 0~x.
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