Red Hat Bugzilla – Bug 642426
Brightness control appears ineffective, stuck on full brightness of backlight
Last modified: 2012-08-16 13:39:34 EDT
Description of problem: Using Fn-F3 and F4 to alter brightness, the popup appears and brightness slider can be moved up and down. However the screen remains at a constant high brightness. Version-Release number of selected component (if applicable): xorg-x11-drv-nouveau-0.0.16-13.20101010git8c8f15c.fc14.i686 kernel-2.6.35.6-40.fc14.i686 How reproducible: It's happening now after a few suspend/resume cycles. I get the impression it's been happening all along. Steps to Reproduce: 1.In runlevel 5 2.Fn-F3 / Fn-F4 to alter brightness 3.Observe popup with slider moving Actual results: Brightness remains constant Expected results: Brightness should vary with controls Additional info: Used to work reliably in F13 with Nvidia driver (not 100% sure about Nouveau)
Note the hardware is Nvidia Ion (MCP79): 02:00.0 VGA compatible controller: nVidia Corporation ION LE VGA (rev b1) (prog-if 00 [VGA controller])
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