Monitor on DVI-I not detected

Matthias Hopf mhopf at
Fri Apr 13 07:29:59 PDT 2007

On Apr 13, 07 15:02:17 +0200, Michel Dänzer wrote:
> > Personally, I think it's best left as is (people connecting
> > non-DDC-capable monitors -- i.e., monitors that need manual
> > configuration anyway -- to DVI ports get to configure it, rather than
> > people who don't having to manually override it).
> I agree.

In some cases it is necessary to activate a potentially connected CRT,
even if it is not detected, but to allow for connecting LFPs to the same

For that we'll probably add the attached patch to our next product,
which adds a value "AUTOCRT" for the MonitorLayout option.

If it is specified for an output, the output is set to CRT if no monitor
is found at all and the connector type allows for analog monitors (that
is: only on VGA, DVI-I, DVI-A). "AUTO" would disable the monitor in this

Would the patch in this or another form be acceptable upstream, until
we have complete RANDR 1.2 support? One alternative would be to add
another option.

I also noted, that "AUTO" isn't documented in the man page yet.



Matthias Hopf <mhopf at>      __        __   __
Maxfeldstr. 5 / 90409 Nuernberg   (_   | |  (_   |__          mat at
Phone +49-911-74053-715           __)  |_|  __)  |__  R & D
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