Welcome to the mess that are laptops and xorg/xfree with projectors.
Both nvidia and ati are as good as each other - and each have their own
little problems.  I currently use an ati M9

I find the main problem is most projectors I deal with work in a native
1024x768 mode, with higher modes internally mapped back to this
resolution.  I normally use 1600x1200 which works - mostly.  Things to
look for are jittery displays, missing edges, and no screen etc.  The
cure? - back the resolution down to something the projector is happy
with.  I find that "specs" saying a projector will do a particular high
resolution rather rubbery - the older the projector the less likely it
will be happy at a high res.

xrandr or one of the desktop applets can be used to change the
resolution on the fly.  if the projector doesn't come on, I go to
1024x768 and work up until we are both happy.

The main linux problem is getting a config that works at all!

BillK


On Mon, 2005-09-05 at 21:35 -0400, Justin Hart wrote:
> Hey folks,
> 
> I'm looking for a quick answer, because I may need to make a hardware
> purchase tonight based on the replies.
> 
> I have a big presentation on Friday.  I noticed, the other day, that
> upon hooking my laptop up to a projector, that the projector failed to
> come on.
> 
> It is worth noting that I have had this configuration working before. 
> I had made entries in xorg.conf that, should have, allowed for this to
> work.  I figured that, because it was a different projector than I had
> originally tested this setup on, that differences in the setup may be
> the issue.  Tonight, I came back to my lab, plugged it into the
> projector that I had originally set this matter up on, and it failed
> to work on that projector.
> 
> Anyway, quick rundown.
> 
> I have a Dell Inspiron 9100.  In it is a Radeon 9700 mobile graphics
> adapter, PCI express.
> 
> Any thoughts?  Do the nVidia cards do this better?
> 
> -- 
> Justin W. Hart
> 
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