intel without connected monitor

strawks strawks at
Tue Dec 16 05:35:54 PST 2008

On Tue, 16 Dec 2008 23:07:03 +1100, garrone <pgarrone at>
> On Tue, Dec 16, 2008 at 12:07:45PM +0100, strawks wrote:
>> Is there a way to force the driver to use the 1080p mode even when no
>> monitor are connected?
> Hi. My recent experiences are only with the latest git checkout.
> I notice the dualhead document uses TMDS, not HDMI, for the SDVO
> outputs.  Have you tried that?

Even though the manpage only mention TMDS the driver only reports HDMI-1
and HDMI-2 outputs.

> If your system supports the "ForceSDVODetect" otpion, (man intel) you
> might
> set that. It may override a bit that indicates if ports are present.
> Have you attempted to use xrandr, as the document suggests?
> Of course it is only useful if xorg starts. Try starting xorg with any
> configuration that will load the intel driver and not generate fatal
> errors. (But ForceSDVODetect may be necessary.) I have found that it can
> be useful for
> unusual configurations, while the xorg configuration approach appears to
> be less generic.
> Peter

Using ForceSDVODetect doesn't seem to have any effect at all, but yes I
would use xrandr if I get Xorg to start.

Note : I'm using the 2.5.1 intel driver.


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