Ok nobody else is responding so I will take a shot.
I don't have anything like this setup but I did have some trouble in this
area. I installed with a simple 15in monitor and then moved the system to my
house which had a Dell flat screen. Well the flat screen displayed 'mode not
supported'.

To solve the problem I had to do the following:

<ctrl><alt> <backspace>  -  several times. This will eventually drop you to
the dark place at the login prompt (I repeat SEVERAL times I had to hit the
key combination)

login as root

at the command prompt:

redhat-config-xfre86 -reconfig

This causes the video configuration system to start from a VGA setup and
deletes all the old configuration information. This allows you to start from
scratch and
define your monitor as you want.  The -reconfig option deletes all the
existing stuff and forces a fresh start.

This may or may not work for you but it worked in my situation.


Like I said I don't have your setup but it is worth a shot.

Terry

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of juju
Sent: Thursday, January 02, 2003 12:06 PM
To: [EMAIL PROTECTED]
Subject: Big problem with X

First, I have a Redhat 8.0 running fine on a PII 400 Mhz, 256 Mb, 10 Go of
HD, and an ATI Mach 64.

I'm trying to use a VGA to TV converter (Guillemot, maxi converter pro) that
accept 31 to 35.5 Khz of horizontal frequency and 50 to 70 Hz vertical
frequency.

I tried it under windows with 2 different machines and it worked very good
even in 800x600@70 hz (37 Khz hfreq)

Unfortunatly, when I tried it with my RedHat, a strange image appeared on my
TV when X was loaded. The bios, boot and console show correctly my on TV,
but not X. I tried a lot of resolution, even by limiting X to 31.5 Khz and
60 Hz (VGA standart) with a resolution of 640x480. But it didn't work.

How I know the tested resolution ? Well the converter is also a passthru and
can display the real VGA resolution while converting it to TV resolution. So
you can have 2 screen showing the same thing: the TV and the monitor. And as
my monitor can tell me which resolution I use, I looked every time.

Moreover, I tried with other linux distrib (Vector Linux 2.5 and Peanut
Linux 9.3). And as soon as I put the correct frequency values in XF86Config,
it worked very well.
So I copied the XF86Config used in both distrib and tried them with the
RedHat 8.0. But it didn't work. The resolution get changed and I could see
the good resolution and frequency on my VGA monitor, but the TV display was
out of range (the TV showed a very bad and strange image of what I saw on
the VGA monitor).

So it is really a RedHat 8.0 matter, not a XFree 4 problem.

So I really need help... What the matter in the redHat 8 default config ?
Where the modelines are stored (I can't see them in XF86Config) ?





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