>Hi,
>
>I just installed XFree 3.3.6 from the RedHat 6.2 beta. It >has
support for the SiliconMotion SMI910 ("Lynx") chipset >and
works fine with a resolution of 800x600 (16 Bit).
>However, I need a resolution of 1024x768 and my external
>monitor supports this resolution at 85 Hz. So I put the
>following modeline in my
>XF86Config:
>
># 1024x768 @ 70 Hz, 56.5 kHz hsync
>Modeline "1024x768" 75 1024 1048 1184 1328 768 771 >
777 806 -hsync
>...and it works, almost. :-( There seems to be a problem >with
the synchronisation, I tried already all possibilities >of
+/-hsync vsync and csync but the picture is somehow >strange.
The lines keep "dancing around", it's the same >when I attach
another monitor (tried with 3 diffrent >monitors). Any idea
what I can do?
>
>Ciao,
>Eric
Well, it could always be the driver, or the chip, or the cable
out the back, but it is probably the timing thats screwing
things up. Some monitors can take a wide range and others want
very specific sets. The first thing to do is make sure this is
the mode actually being used (it's probably a good idea to
remove or comment out any you not using actively). Second, try
a different modeline, there are reams of them that people have
been succesful with in "/usr/X11R6/lib/X11/doc/Monitors".
Finally, third, there is a great little utility called
"xvidtune" that lets you change the video timings in real time.
Pull it up and Xwindows and start playing until you find
something that works.
Hope my rambling helps.
Adrian
