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As the question statement explains itself, I'm on Ubuntu 14.04 and my screen brightness is reset to maximum after every boot, no matter how many times I reset.

I applied the solution provided here Brightness is reset to Maximum on every Restart But once, & it resulted into corrupting my Ubuntu Installation, I had to re-install my Ubuntu copy. Now I'm reluctant to try that again.

I need a safer method to set this problem straight.

Hardware: Laptop - HP Pavilion DV6 -7071tx

Screen Res - 1080p Full HD

Graphics - Nvidia GT650M

Ubuntu - Dual boot & Installed on 32Gb - SSD

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2 Answers 2

Reset to default
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Go to terminal and type sudo nano /etc/rc.local . A window will pop out, and add echo 5 > /sys/class/backlight/acpi_video0/brightness before the last line “exit 0″. Number 5 is the value of your screen brightness. With cat /sys/class/backlight/acpi_video0/max_brightness command you can check the maximum. This might work for you, Have fun.

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  • That didn't solve it. But I just updated Ubuntu using Software Center (80Mb+) and it has solved my problem. The brightness state is saved on shutdown and recovered on restart dynamically. Just what I wanted. Thanks for help btw.
    – InamTaj
    Jun 10, 2014 at 7:01
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In case anyone is still having this problem what I did to solve it in ubuntu 18.04 is:

printf '#!/bin/bash\n\necho 20 > /sys/class/backlight/nvidia_0/brightness' | sudo tee /etc/rc.local && sudo chmod 744 /etc/rc.local

(Change 20 for any number that you desire between 0-100)

The brightness level is on /sys/class/backlight/nvidia_0/brightness so changing the value that's in there, it will automatically modify the current screen brightness.

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