[ltp] LCD - technical details

[Eric Van Buggenhaut]

On Sat, Nov 19, 2005 at 02:03:08PM +0100, Lars Otten wrote:
> On 19.11.2005 13:03, Matthias Redlich wrote:
> > I called IBM some days ago and asked for more technical details about my
> > LCD in my laptop. But they were not able to give me a better answer than
> > "use it with 60 Hz".
> 
> But that should be all you need to know IMO. ;)
> 
> > I am interested in a better description of my
> > display containing seperate information for the horizontal sync rate or
> > the vertical refresh rate and such things. A complete datasheet would be
> > great.
> 
> You can calculate the values yourself: Given the fixed 60 Hz and the
> resolution you can then compute the horiz. sync rate.
> 
> > I would like to use the values for a good xorg configuration. I have
> > xorg working - that is not the problem. But I am interested in the
> > *real* settings for my LCD. Which rates are you using in your xorg.conf?
> 
> What I always do is setting the horiz. sync rates to a wide range, like
> 31.5-95 -- this should be sufficient for all resolutions. Then I just fix
> the vert. rate at 60 by setting the respective range to 60-60. The
> commensurate horiz. rate is then selected automatically for each resolution
> by the driver.

Refreshing vert. rate is meaningless when using LCD panels (there's no 
such thing as a refreshing beam).


-- 
Eric VAN BUGGENHAUT
Eric.VanBuggenhaut@AdValvas.be