Intel driver EDID not probing proper resolutions over HDMI

Shawn Bohrer shawn.bohrer at
Sat Jul 21 12:41:56 PDT 2007

On Sat, Jul 21, 2007 at 09:44:24AM -0700, Keith Packard wrote:
> What I've learned recently is that the HDMI receivers in most consumer
> televisions are fairly crummy and that they are only designed to operate
> at standard HD resolutions (and some not even at the 1080p resolution
> you're trying to use).

Well, I imagine the HDMI receiver is indeed crummy, but I have been
using it successfully at 1080p for the last 5 months.  Though I usually
had to restart X twice to get it to display at 1080p.

I believe my last build was from the modesetting branch on February 20th
but now that I'm on Xorg 1.3 I can't seem to get that to compile

> I managed to get my HDMI receiver to sync at 1080p once or twice, but
> now no joy. Connecting the same monitor through DVI and things work just
> fine. Mine reports crazy stuff for EDID over HDMI (the highest
> resolution it lists is 1080i); over DVI, I get the native panel
> resolution along with all of the HD modes (and the usual range of VGA
> modes).
> If the monitor has a DVI connection, you can get an HDMI to DVI
> converter as HDMI and DVI use exactly the same signalling standard, and
> the DVI receiver chips are a lot better than HDMI.
Yes I have two DVI ports so I could try going that route though I would
need a new cable.

> > (II) intel(0): EDID for output TMDS-1
> > (II) intel(0): Not using default mode "640x350" (vrefresh out of range)
> The monitor isn't even responding to DDC over the HDMI connector, that's
> not a good sign.

This is something I wasn't clear on.  Is DDC required?  Is it possible
to set a Modeline in my xorg.conf and force it to use that resolution?
I've tried doing this with several different Modelines that I either got
from gft, the Xorg.0.log, or off the Internet, but when I do the display
is always blank, and I see the following in my Xorg.0.log

   (II) intel(0):   Output TMDS-1 is connected to pipe none

I suppose I may just be using the wrong Modelines.  What is the best way
to generate these?

> > (II) intel(0): Output VGA-2 connected
> So your card has a TV out chip as well? I'm trying to fix this output,
> but haven't made any progress yet. You may want to disable it so it
> doesn't get configured at server startup time.

Yeah, actually I forgot it had this, and I was wondering what the heck
VGA-2 was.  This may be a stupid question, but how do I disable it?


More information about the xorg mailing list