Possible workaround: add acpi_backlight=vendor to the kernel params (GRUB_CMDLINE_LINUX_DEFAULT in /etc/grub/default then sudo update-grub). Then the xorg driver also picks the intel_backlight.
Chris -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/828296 Title: [Latitude E6220/E6420] Brightness hotkeys are sluggish To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/828296/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
