So as a wokraround: sudo vim /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" #GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" sudo update-grub reboot This option adds the dell_backlight: ubuntu@ubuntu-Latitude-E6430:~$ ls /sys/class/backlight dell_backlight intel_backlight nv_backlight Note that sending events to the intel_backlight like so: root@ubuntu-Latitude-E6430:~# echo 1000 > /sys/class/backlight/intel_backlight/brightness works too. More info regarding backlight troubleshooting: http://hansdegoede.livejournal.com/13889.html I guess we need a kernel patch/quirk. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1683445 Title: E6430 brightness control not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1683445/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
