[Intel-gfx] Problems configuring unique xorg.conf file

[Nasa]

----- "Alan W. Irwin" <irwin at beluga.phys.uvic.ca> wrote:

> On 2010-08-26 10:47-0000 Nasa wrote:
> 
> > Hi,
> >
> >
> > I am trying to configure a rather obscure resolution (800x480) which
> is the
> > native resolution for my monitor.  The monitor doesn't provide EDID
> or DDC
> > information (it's connected over VGA).  And the default settings by
> the
> > driver produces displays that don't fit the monitor properly.  I
> would like
> > to construct a xorg.conf file with appropraite vertical refresh
> rates, horizontal
> > syncs, and/or modelines to work correctly with the monitor. 
> However, there
> > doesn't seem a way to turn off the driver defaults for those items.
> I tried options
> > like NoDDC, UseEDID, etc with no luck.  I also tried using xrandr to
> change
> > resolutions after X has started.  The results end up being worse
> than the
> > intial problem I was trying to fix (ie: the screen is bigger than
> the area
> > available to display it).  I expect my inability to find a suitable
> solution
> > is due to my lack of knowledge -- so I hope someone can fill me in
> to what
> > I am missing.  Thanks in advance,
> 
> Earlier this year before I replaced my long-time Sony monitor with an
> LCD, and upgraded from Debian Lenny to Debian testing, the results of
> gtf and PreferredMode worked for me. For example, my xorg.conf file
> for that monitor had the following lines in the Monitor section
> 
> #gtf 1024 768 85
> # 1024x768 @ 85.00 Hz (GTF) hsync: 68.60 kHz; pclk: 94.39 MHz
> Modeline "1024x768_85.00"  94.39  1024 1088 1200 1376  768 769 772
> 807
> -HSync +Vsync
> Option "PreferredMode" "1024x768_85.00"
> 
> Of course, intead of using the above example, you will want to run
> something like
> 
> gtf 800 400 85
> 
> from the command line (man gtf), paste the results to your Monitor
> section, and consistently update the identification of the mode used
> by PreferredMode.
> 
> I emphasize the above configuration lines worked for an old version of
> the
> Intel driver (Debian Lenny), and I don't know whether they  would
> work
> for a modern version.  But it is worth a try.
> 
> Alan

Thanks Alan,

I actually attempted this via CVT which ended up with horizontal sync out
of range errors.  Reading the MAN page for CVT didn't show any options to
put in options to set that.  Does GTF have this capability?  I also tried
an online modeline creation site (link alludes me, as I am at work right 
now) with slightly better, but still not totally work results.

Nasa