Why is xorg ignoring the frequencies I give it?

[Sasha Tsykin]

Andy Grove wrote:
>
> I asked a vague question yet about getting ubuntu to work with my 
> monitor and got no replies – probably because I didn’t give enough 
> detail for anyone to help. Here is a more specific version of the 
> question.
>
> I have installed ubuntu 5.10 on a Dell PowerEdge SC 420 machine with a 
> Sony SDM-S204 20” LCD monitor. On boot up the monitor gave me a 
> frequency out of range message.
>
> I ran the sudo dpkg-reconfigure xserver-xorg command and it seems to 
> recognize everything ok and set the correct frequencies (28-92KHz 
> horizontal, 48-85Hz vertical) but on restarting xorg the monitor again 
> tells me that the frequency is out of range (70.5 KHz / 87Hz).
>
> So basically, xorg appears to be completely ignoring the HorizSync and 
> VertRefresh settings in the xorg.conf file.
>
> Does anyone have any advice on getting around this problem?
>
> Many thanks,
>
> Andy.
>
The refresh rate is calculated using the Horizontal Synchronization and 
Vertical Synchronization. But the connection between them is not 
obvious. Suffice to say that there is no mistake. If the xserver can't 
start, then you have entered something about the syncs incorrectly.

Sasha