Comment 4 for bug 338328

Thanks for the update; I'll commit this once we sorted out the brightness issue.

Hm, it seems that your hal already seems to know that it should control the brightness in hardware, from your lshal:

    laptop_panel.brightness_in_hardware = true (bool)

so changing 10-laptop-panel-hardware.fdi won't help. Could you try

  sudo mv /etc/acpi/events /etc/acpi/events.disabled

and see whether this changes anything? If not, please change it back:

   sudo mv /etc/acpi/events.disabled /etc/acpi/events

Thanks!