Latitude D620 LCD brightness issue

[Michael E Brown]

On Fri, May 04, 2007 at 01:05:00PM +0200, Arnaud Quette wrote:
> Running an Ubuntu feisty (x86), I've installed (rebuilded debs)
> libsmbios 0.13.6 and hal 0.5.9 (packages backported from the gutsy
> pool).
> 
> I've then tried to play a bit with the libsmbios provided tools, and
> ended up with an LCD brightness issues. The Fn keys (up / down)
> doesn't work (nothing impacted). Only the Fn Auto switch the LCD from
> a dark to a light setting. But being on AC power, the screen is really
> dark, and I can't find a way to address it through dellLcdBrightness
> (-v only affect the battery setting!).
> 
> The question is: How can set the ac value with dellLcdBrightness?
> 
> Some outputs:
> $ dellLcdBrightness -b
> Read Battery Mode Setting
>     current: 7
>         min: 0
>         max: 7
> 
> $ dellLcdBrightness -a
> Read AC Mode Setting
>     current: 0
>         min: 0
>         max: 7

The options are sensitive to order. If you run
    # dellLcdBrightness -a -v <newval>

It will change the AC setting.
--
Michael