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Ubuntu / Debian systems have a common problem, that is, each boot, the system will put your screen brightness to maximum. I was surprised why the 14.04 version of the problem is not fixed. But we can make Ubuntu startup script regarded brightness settings each time to a fixed value.
First, look at your screen brightness range of values:
sudo cat / sys / class / backlight / acpi_video0 / max_brightness
I was 15, which means that the luminance value may be between 0 and 15.
Modify /etc/rc.local, before the final exit 0 add:
echo 3> / sys / class / backlight / acpi_video0 / brightness
Complete system will start the final implementation of the script, so each boot, will set the brightness value to 3. |
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