Re: PowerBook G4 screen in Debian not as bright as Mac OS X or OpenBSD

[Torrance <torrance123@gmail.com>]

Hi Amit,

I'm not sure what the graphics card is in your powerbook, but I noticed a reduction in brightness compared to OSX when using Debian on my iMac G5 (revA) which has an nvidia device. When I put the question to this list, this is the response I got back:

On Sun, Dec 10, 2006 at 03:03:29PM +1300, Torrance wrote:

4) Screen too dim. The default backlight brightness in Debian is noticably

dimmer than in MacOS X. So far, we have not been able to work out how to fix

this.

What kind of graphics chip do you have?

You should be able to upload a new backlight curve if you're using Linux

2.6.18 or higher. Also, for NVidia chips, we haven't yet found out for

sure how to detect the maximum value allowed (I was the one rewriting

the backlight infrastructure in 2.6.18). Hence it might be that, when

using an NVidia chipset, the display is not that bright as in Mac OS X.

And anyway, this is in no way distribution specific.

Greets,

Michael

Unfortunately, I had no idea how to play with the brightness curve so I had to stick with the brightness I was given.

Torrance

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