Re: Latitude D620 LCD brightness issue

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

It is odd that the FN- keys dont work. There is no way to
disable this
from software that I know of.

> 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!).

You can also go into BIOS setup to change this, in addition
to the
previously-posted fix.

It may be that HAL isnt properly distinguishing between
ac/battery modes
and might need to be enhanced/fixed.
--
Michael
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Hi Michael,

thanks for your previous answer.

2007/5/4, Michael E Brown <Michael_E_Browndell.com>:
> 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
>
> It is odd that the FN- keys dont work. There is no way
to disable this
> from software that I know of.

in fact, these were working, but limited by the range (both
min and
max were set to 0)

> > 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!).
>
> You can also go into BIOS setup to change this, in
addition to the
> previously-posted fix.
>
> It may be that HAL isnt properly distinguishing between
ac/battery modes
> and might need to be enhanced/fixed.

now that both ac/batt ranges are set to min 0 and max 7,
things are fine.

keep up your good work Michael,
Arnaud
-- 
Linux / Unix Expert - MGE UPS SYSTEMS - R&D Dpt
Network UPS Tools (NUT) Project Leader - http://www.networkups
tools.org/
Debian Developer - http://people.debi
an.org/~aquette/
OpenSource Developer - http://arnaud.quette.fr
ee.fr/
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