Red Hat Bugzilla – Bug 469803
Backlight control does not work on MacBook Pro 3.1
Last modified: 2013-01-10 02:08:25 EST
Description of problem:
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. This driver is included with the standard kernel package; it just needs loading.
Version-Release number of selected component (if applicable):
Attempt to use display backlight controls on a MacBook Pro 3.1 or 4.1.
Steps to Reproduce:
1. Log into GNOME on such a MacBook Pro.
2. Use F1 and F2 to attempt to change the backlight brightness.
Using the keyboard's backlight keys causes the usual brightness graphic to show up, but no bar fills it and the display brightness does not change.
Using the keyboard's backlight keys causes the usual brightness graphic to show up, with a bar indicating the current brightness level and the display brightness to change.
Running ``modprobe mbp_nvidia_bl'' and restarting X corrects this problem.
Pommed works, but the driver it uses causes wireless provided by ath9k to stop working, so installing pommed like recommended in bug 331161 is not an acceptable fix.
HAL doesn't autoload modules. The kernel needs to autoload this before HAL will work correctly.
I've reported the kernel autoload problem in bug 462409.
*** This bug has been marked as a duplicate of bug 462409 ***