I'm using NetBSD-1.3 and X11 with 1024x768 resolution on Quadra650.

I rebuilt my kernel by applying the 'madhatter patch' to "mac68k/machdep.c"
and commenting out an 'if sentence' of "dev/grf_iv.c." The 'if sentence' is
described in "grfiv_match()" function as follows:

/*
        if (sense == 0)
            found = 0;
*/

I also confirm to work fine with 832x624 resolution (640x480 maybe). If
'madhatter patch' is not applied and only above hacking is applied, then
X11 works fine with 1024x768 resolution but not with 832x624 resolution.

"Michael R Zucca" wrote:
> I recently had a little brainstorm about the Quadra "My system deosn't
> get a grf devices when I boot with such and such mointor" problem.
> 
> Originally I thought it was a bad variable not getting set (and it still
> may be to some extent). However, if you look closely at the code
> you'll notice that Allen put in a little preliminary monitor
> sense code.
> 
> That code isn't correct and should be removed. My guess is that the
> monitors in question leave the sense register at 0 and the code
> concludes there's no monitor and doesn't attach the grf device.
> 
> The code's there in an attempt to provide "headless" support but I've
> got correct code in my Quadra driver I'm working on now. So you'll
> have to wait a little for correct monitor sensing :)
> 
> I feel silly for not having thought of this earlier :)
> 
> Could somebody please give this a try?
--------
$B9u9>!!M44u!!(By-kuroe@sys.es.osaka-u.ac.jp