Red Hat Bugzilla – Bug 701070
Keys for backlight on Macbook Pro 7,1 give no action
Last modified: 2012-08-07 11:51:01 EDT
Description of problem:
On the beta of Fedora 15 the backlight keys (F1 and F2) not dim the screen. The keys work, but it not dim the screen. The screen dim icon is on the screen, but there is no dim action. Maybe it is because i use the nouveau drivers? Normaly on other linux distribution they bl-nvidia or that kind of drivers. The keyboard backlight work out of the box, and the for screen backlight it looks like it work out of the box, only the F1 and F2 not do any dim action. Hope it can be fixed before the Fedora 15 release
Created attachment 518104 [details]
Fix for backlight keys on MacBookPro6,1
I see the same behavior on a MacbookPro6,1, which I believe has the graphics hardware.
The problem is that gnome-power-backlight-helper tries to use /sys/class/backlight/nv_backlight to adjust the brightness, but on these macbooks that hardware isn't connected to anything. The correct path is /sys/class/backlight/apple_backlight.
I've attached a patch for gnome-power-manager that fixes the problem. I don't have any other laptops to test with, but as far as I can tell this won't break anything for other hardware.
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