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
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.
