[GRLUG] monitor frequency on boot

[Ron Lauzon]

Bob Kline wrote:
> I have an LCD monitor with a peak frequency of 75 Hz.  When I boot ( 
> latest version of
> Mandriva Linux ),  the monitor frequency is 85 MHz,  and the monitor 
> simply announces
> that this is out of range.  At the login prompt,  which I of course 
> cannot see,  I simply log in
> blind,  and then the settings for my login take over and all's well.
>
> The question is how I change the frequency of the system at log in.   
> I did a switch to "su" after
> login in,  and looked at the settings,  but that shows 75 HZ too.  In 
> fact,  the monitor frequency
> takes on several values during the boot process,   and I can see the 
> entire boot process,  up
> to the point where the login screen comes up.
>
> So the question is really how I change the frequency at that point so 
> I can see the login screen.
It sounds like the settings for X.org are incorrect.

They are in /etc/X11/xorg.conf.  The Mhz of the monitor are pretty 
clearly marked.  Just set them to what your monitor should be (of 
course, copy off the old xorg.conf before you mess with it - just in case).

-- 
Ron Lauzon - rlauzon at acm dot org
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Microsoft Free since July 06, 2001
Running Mandriva Linux 2005LE