Sunday, July 14, 2013

Ubuntu laptop - set start-up brightness level

Best fix for setting the desired brightness level when the computer first starts (for laptops & notebooks).

Adjust brightness to the desired level.

1) View maximum brightness level:
cat /sys/class/backlight/acpi_video0/max_brightness

2) View current brightness level:
cat /sys/class/backlight/acpi_video0/brightness

3) Set the brightness level to apply on the next restart. Edit /etc/rc.local and add the following line before exit 0:
echo VALUE > /sys/class/backlight/acpi_video0/brightness

1 comment:

delta_log_R said...

Thanks for this, Ionut. I just tried this out on my laptop that is running Ubuntu 14.04 and can confirm that your method works as advertised. Cheers!