>>>Declan Moriarty wrote:
 > On Mon, 20 Sep 1999, Ahmad Justanieah wrote:
 > > Hello everyone
 > > 
 > > Recently I have been able to get RedHat 6.0 running on my laptop. But
 > > the only thing that annoys me is that I'm
 > > having trouble configuring the Xserver. Currently, I'm using XF86Mach64
 > > server. It is working but the screen is broken into half and there is a
 > > part that does not appear at the middle ,do not know much about the
 > > options or what should I play around to solve the problem.
 > 
 >      Right, I'll have a go. If the screen is broken in half
 > vertically, your problem is with the line or horizontal
 > frequency. If it's split vertically, it's a refresh problem.  One
 > frequency is a lot too fast, your screen is synching on double the
 > frequency and the black gap you see in the middle should be at each
 > edge. The sums are as follows:
 > 
 >      For, let's say 1024 x 768 at 60 Hz refresh

I've seen the same problem on a laptop of a friend.  The problem there
is AFAI understood it that the Xserver detects that the LCD is
1600x600 (as listed in Xserver output) instead of 800x600.  That's IMHO
the reason why the left half of the screen was not visible and the right
half was black.  I've played with the modes without success.

I've found no way to override in XF86Config the size of the TFT that the
Xserver autodetects.   It is a Chips&Tech. chip and the SVGA server
listed this chip as supported in the output.  The README for C&T did
not help.

Any idea how to fix it, e.g., how to override the autodetected TFT size?

Achim
P.S. Window 98 was happy with the on board chip.
but it always looked like 
 > 
 > Horizontal frequency would be 768 x 60 = 46080 Hz
 > Frame or refresh would, surprisingly be 60 Hz ;-)
 > The dot clock would be ABOUT {1024 x 768 x 1.25 (The black gaps -
 > remember?)}  x 60 = 58,982,400
 > 
 > Don't EVER specify these things exactly, as if you do and X disagrees
 > with your calculations by a fraction it will not accept the line.
 > The Horizontal, & vertical monitor frequencies, and the dot clock or
 > DAC can all be given in ranges. What should in fact happen is that you
 > get a bit of black line at each edge that's never seen. You need the
 > video timings HOWTO. Use XF86Setup in RedHat, and have a go.
 > 
 > 
 > 
 >  --
 >      Regards,
 > 
 >      Declan Moriarty.



-- 
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