[Savage40] Thinkpad T23 and external monitor 1680x1050

[Gianluca Interlandi]

I have been able to fix even the problem with DVD watching! I had to set 
the horizontal refresh rate to 60 Hz. SAX had calculated the modeline for 
74 Hz and that was probably too much for the S3 video card. So I used the 
command:

xmode -r 62 -x 1680 -y 1050

which produced the modeline:

"1680x1050" 147.14 1680 1784 1968 2256 1050 1051 1054 1087

I inserted that into xorg.conf and it worked right away. All flickering is 
gone even while watching DVDs.

Thanks for the hints.

Gianluca


On Fri, 5 Oct 2007, Alex Deucher wrote:

> 
> --- Gianluca Interlandi <gianluca at u.washington.edu> wrote:
> 
> > I have a Thinkpad T23 with S3 video card. I have bought a Philips
> > 20inch 
> > 1680x1050 widescreen monitor (200w6cb) which I attach to my laptop
> > through 
> > the VGA connector. I use the options "UseBios" "FALSE" and "CrtOnly" 
> > "TRUE".
> > 
> > It works fine at the full resolution of 1680x1050 and 32-bit color
> > depth. 
> > However, if I try to watch a DVD movie with mplayer or xine the image
> > 
> > starts flickering and there are strange horizontal lines. This does
> > not 
> > happen if I watch a mpeg file containing a movie at low resolution.
> > If I 
> > turn down the color depth to 16-bit everything is fine and I'm able
> > to 
> > watch DVDs. What could the reason be? I have xorg-6.8.2 and 
> > savage-20050718 drivers.
> > 
> > In any case, I hope that the information in this e-mail is of help to
> > 
> > other people who own a Thinkpad T23 and are thinking about using it
> > with 
> > an external monitor. In summary, it works apart from small issues
> > with 
> > DVDs and 32-bit.
> > 
> 
> Memory bandwith.  The chip doesn't have enough bandwidth to push a
> hi-res video as well as a 32 bpp widescreen graphical display.
> 
> Alex
> 
> 
> 
>        
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-----------------------------------------------------
Dr. Gianluca Interlandi gianluca at u.washington.edu
                    +1 (206) 685 4435
                    +1 (206) 714 4303
                    http://biocroma.unizh.ch/gianluca/

Postdoc at the Department of Bioengineering
at the University of Washington, Seattle WA U.S.A.
-----------------------------------------------------