Some more clarification. I tried under KDE Plasma 5.1 (Neon) and still I could not change the brightness of the backlight.
However, the CLI commands that fail in a terminal running under an Xorg session work flawlessly under a console (<CTRL><ALT><F1>). cd /sys/class/backlight/acpi_video0 echo 5 >brightness # Works under the console! echo 10 >brightness # Works under the console! This all suggest that somehow, Xorg is inhibiting the brightness control. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1389215 Title: Brightness controls are not working in Unity / Xorg. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1389215/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
