# Screen brightness after suspend in Ubuntu

Many laptops have their screens dimmed after returning from “suspend” and cannot get back to their original brightness. The bug hasn’t been fixed for 3 years. A fix is provided in the bug report by putting something like the following in /etc/rc.local:

brt=cat /sys/devices/virtual/backlight/acpi_video0/brightness
abrt=cat /sys/devices/virtual/backlight/acpi_video0/actual_brightness
if (( $brt !=$abrt )) ; then
echo \$abrt > /sys/devices/virtual/backlight/acpi_video0/brightness
fi


Use the following

find /sys/ -iname '*bright*'


to see if you need to change the exact path to the files.