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Re: X11 without a connected screen

On Tue, Feb 15, 2011 at 15:15:36 +0100, Cyril Brulebois wrote:

> Hi,
> adding debian-x@ to the loop.
> Mario Lang <mlang@debian.org> (15/02/2011):
> > > Please try to connect it.  X driver developpers are not aware that
> > > it can be useful to start X without a physical screen attached.
> > 
> > I've noticed this behaviour at least at one point in the past.
> > 
> > I think we should follow up on this and try to raise awareness
> > upstream, or at least file a bug for it in our bts.
> I've just tried that with squeeze's -video-ati & -video-dummy drivers
> installed, and indeed, ati tries to find a screen, fails, and bails
> out.
> We've tweaked this already for intel/vesa fallback, so that not
> finding a screen doesn't put an end to the whole X start-up, and so
> that other drivers are considered.
> I guess it might be sufficient to do the same for other drivers (at
> least making sure ati and nouveau support that would make sense, I
> guess).
I don't know the context here, but the 'fall back to the dummy driver'
thing seems like a bad idea.  There's already a way to force outputs as
enabled from xorg.conf iirc.


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