Ubuntu – Screen brightness reset to minimum after every reboot

11.10brightness

Ubuntu 11.10 doesn't save my brightness settings between sessions. Everytime I boot up, the brightness is always at zero, and I always have to set it back to my preferred setting (at maximum). How can I ensure that my brightness preference will persist after reboot?

Best Answer

In the file /etc/rc.local add before line exit 0:

echo 5 > /sys/class/backlight/acpi_video0/brightness

Where 5 is the brightness level from 0 to 10

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Ubuntu – How to make Unity remember brightness settings

The short answer is: you can't. Gnome power manager doesn't save the brightness setting. The best you can do is to automatically set it to a reasonable default at startup.

For 11.10, the only solution I have found that works is the one given here: http://blog.ishans.info/2011/09/25/set-brightness-automatically-at-the-startup-in-linux/

Save http://ishans.info/attachments/article/65/setBrightness.py locally, change the brightness percentage in the last line to your preferred value, and add a new startup application to run:

python /wherever-you-saved-the-script/setBrightness.py

Ubuntu – Brightness setting is reset to maximum at login

A possible solution: Add

xbacklight -set 80

to the file

.xinitrc

This will set the backlight to the desired value (80) whenever X is started. .xinitrc is the configuration file responsible for the X-Server.

Best Answer

Related Solutions

Ubuntu – How to make Unity remember brightness settings

Ubuntu – Brightness setting is reset to maximum at login

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