Xorg -configure questions

[gene heskett]

On Thursday, February 24, 2011 01:53:16 pm Alan Coopersmith did opine:

> On 02/24/11 07:06 AM, lfs lfs wrote:
> >     From: lfs lfs <linuxfromscratch at yahoo.com>
> >     Subject: Xorg -configure questions
> >     To: xorg at lists.freedesktop.org
> >     Date: Thursday, February 24, 2011, 8:04 AM
> >     
> >     Hi,
> >     
> >       for example:
> >     ----------------------------------------------------------
> >     Xorg -configure  //1st flickering here
> >     cp -rf /root/xorg.conf.new /etc/X11/xorg.conf
> >     startx //2nd flickering here
> >     ----------------------------------------------------------
> >     
> >     This will flicker screen twice. How can I make this flicker only
> >     once?
> 
> Drop the first two steps and startx with no xorg.conf.
> 
> There's no point creating one if you're not going to change any settings
> from the defaults, just let the server run with the defaults from its
> autoconfiguration.

This is not always the magic twanger, Alan.  With no xorg.conf, it insists 
on using the ati drivers if they are installed, for an ati card.  Or the nv 
drivers for an nvidia card.  This is deadly to the performance of an rtai 
based application such as emc.  So we must make enough of an xorg.conf to 
specify the vesa driver, which has no or very little effect on rtai 
latencies and gives us more than adequate video to carve whatever we can 
write gcode to do.  Admittedly, this is a 'narrow' application, but it 
should be considered.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
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-Ed Howdershelt (Author)
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