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SubjectRe: Brightness control for MacBook Pro - Nvidia 9400
On Thu, Feb 11, 2010 at 09:38:45PM +0100, Soeren Sonnenburg wrote:
> Dear all,
>
> I am booting a MacBookPro5,3 using elilo and efifb. Now I'd like to use
> pommed to control display brightness (which won't work). Digging around
> in mbp_nvidia_bl.c I figured out that tries to control the geforce 9600M
> instead of the currently active geforece 9400m

So, first of all, use nouveau instead. But moving on...

> 02:00.0 VGA compatible controller: nVidia Corporation G96 [GeForce 9600M GT] (rev a1)
> 03:00.0 VGA compatible controller: nVidia Corporation C79 [GeForce 9400M] (rev b1)
>
> Does anyone have an idea which bytes to tweak to change brightness
> levels for the 9400? Seems like 0x52f does not work - at least
> setpci -s 03:00.0 0x52f.B=10 fails...

Those are mmio registers, not PCI config ones. You won't be able to
change them with setpci.

--
Matthew Garrett | mjg59@srcf.ucam.org

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