Is IgnoreEdid broken?

[Alex Deucher]

On 10/14/07, James C. Georgas <jgeorgas at georgas.ca> wrote:
> On Sat, 2007-13-10 at 10:46 -0400, Alex Deucher wrote:
> > whoops, yeah, that option looks like currently broken.  The problem
> > is, in a randr 1.2 world, when you enable that option, do you want to
> > ignore the edid on all outputs or just a specific one?  I suppose we
> > should probably just remove it as there's a better method now.  see
> > this page for more info:
> > http://www.intellinuxgraphics.org/dualhead.html
> > Basically you specify monitor sections and assign them to outputs.
> > from there you can add modelines and specify what you want as the
> > preferred mode in each monitor section.
> >
> > Alex
> >
> Tried it, and it still ignores my override, and uses the EDID.
>
> My problem is that the reported dotclock range for my panel is wrong.
> Either the EDID on the panel is wrong, or the driver is reading it
> wrong. I'm not sure which, but the result is that the reported maxclock
> is 170, when it should be 155 or thereabouts. All the other EDID data
> seems to be reasonable, so I just want to adjust the clock range a bit,
> and use EDID values for everything else.


Please post the edid to the list so we can add a quirk for it.

>
> I tried using the maxclock option, and the server reads it in, but
> doesn't apply it to my modelines.
>
> With 6.6.*, I still couldn't selectively modify the clock range, but at
> least I could blow away all the EDID data and manually enter the values
> in the monitor section. I can't do that any more.
>
> Any thoughts on how to do this?

in your monitor section specify the max dotclock (from the xorg.conf man page):

       Option "MaxClock"  "frequency"
              This optional entry specifies the maximum  dot  clock,  in  kHz,
              that is supported by the monitor.

Alex