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[Ubuntu QA Website <226894@xxxxxxxxxxxxxxxxxx>]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/226894

** Tags added: iso-testing

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https://bugs.launchpad.net/bugs/226894

Title:
  Backlight control does not work on MacBook Pro 3.1

Status in Hardware Abstraction Layer (HAL):
  Fix Released
Status in hal package in Ubuntu:
  Fix Released
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  1) The Linux module mbp_nvidia_bl needs to be autoloaded to provide
  the backlight device for the NVidia card in 3.1 and 4.1. The fix for
  this is detailed here, and this should be carried by us as it
  currently does not work. http://lkml.org/lkml/2008/9/16/284

  Workaround: load the module by other means, either on-demand with
  modprobe or by adding the line to /etc/modules

  2) G-P-M gets confused by the phoney MacBook Laptop Panel HAL device
  (that is actually dead since the addon providing its services doesn't
  work for NVidia). Upstream HAL received this fix to only spawn this
  for the relevant models.
  http://gitweb.freedesktop.org/?p=hal.git;a=commitdiff;h=95bd4f1bf9a62f1551461841d64f6f1cdea6a92e

  Workaround: comment out the <spawn> element for the laptop panel in
  the file.

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