Fedora 10, xrandr and inFocus projector

[Alex Deucher]

On 3/29/09, Scott C. Frase <sfrase6 at comcast.net> wrote:
> Hi guys,
>  I'm a new user to the list with, what else, a sticky problem.  I have a
>  dual boot MacBook Pro (2.33Ghz Core 2 Duo) that runs both Leopard and
>  Fedora 10, x86-64 using ReFit as the boot loader.  I am trying to connect
>  an InFocus projector to the DVI output of the Mac while running under Fedora.
>
>  The InFocus is connected this way:
>  MacBook external DVI output > DVI-VGA dongle > VGA - M1-DA cable > InFocus
>  M1-DA connector
>
>  Unfortunately, the problem is that though xrandr sees the DVI-0 port as
>  connected, the InFocus doesn't get the signal or spring to life through
>  the setup listed above.
>
>  I've verified that the DVI-0 output works with a regular DVI cable
>  connected to the DVI input on my Dell LCD panel.  So this means a
>  digital signal is being output from the port.  Now, I've also verified
>  that the DVI-0 output from Fedora does NOT work with the DVI-VGA dongle
>  connected to the VGA input on the Dell.  When connected with the DVI-VGA
>  setup listed above, xrandr sees that the InFocus is connected (shown
>  below).  Also, Gnome sees the InFocus in the connected displays.
>
>  On the flipside, I've verified that the InFocus projector works
>  using the DVI-VGA cable setup when booted from the Mac OS. So that's
>  odd.
>
>  Since I can see the output while connected to the Dell's DVI input, I
>  don't think this is a configuration issue.  But maybe Fedora just doesn't
>  like the DVI-VGA dongle. I'm sure I could buy an M1-DA direct to DVI
>  adapter and be done with it, but I'd rather save the $55 and figure out
>  why the Mac sees the Infocus, but why Fedora has troubles.

If you are using F10 with kernel modesetting (KMS) it doesn't have the
proper quirks do deal with the broken connector table on the macbooks.
 I think the non-KMS code shipped with F10 should have the proper
quirk handling, if not, you may need to upgrade your ddx.

Alex