[mythtv-users] EDID and Sony TV

[Stephen Worthington]

On Sun, 14 Feb 2016 13:18:29 +0100, you wrote:

>Hello all,
>
>I have a little problem with Sony TV.
>
>I use to suspend to disk instead of power off the frontend.
>
>In the resume I use to power on the TV with a CEC command, it works
>well, but the problem is that the TV HDMI 1 input is in black. I need
>to change to HDMI 2 and then to HDMI 1 to get it working.
>
>I read this wiki page:
>https://www.mythtv.org/wiki/Nvidia-cards_and_no_picture_when_box_is_on_before_the_TV
>
>I extract the EDID file and add in /etc/X11/xorg.conf:
>http://paste.debian.net/386096/
>
>I reboot the frontend and this is what I have in the xorg log:
>http://paste.debian.net/386098/
>
>It says "The EDID for SONY TV (DFP-1) contradicts itself".
>
>Need I configure something else?
>
>I will appreciate your help.
>
>Regards.

The messages about "contradicts itself" are a red herring.  Sony has
bad EDID data in a lot of its TVs, as do many other manufacturers.  X
knows about this problem and works around it automatically.  You will
see exactly the same messages no matter whether it is using the
extracted EDID or working with the EDID directly from the TV.

What I do not see in your log output that is in mine is another
section at the end where it has lines that say "Setting mode" and on
each of them there is mode data for one of the modes the TV supports.
You have only the one "Setting mode" line towards the start of the
log:

[    25.299] (II) NVIDIA(0): Setting mode "DFP-1:nvidia-auto-select"

That is X saying that it will select the real modes automatically from
the various sources for mode lines for the DFP-1 device.  Nowhere does
it actually then select those modes.  Here are a couple of the
"Setting mode" lines from my log:

[    94.644] (II) NVIDIA(0): Setting mode "DVI-I-1: 1920x1080_50
@1920x1080 +0+0"

and 

[ 51896.633] (II) NVIDIA(0): Setting mode "DVI-I-1: 1920x1080_50
@1920x1080 +0+0"

So I think you need to tell X to actually use your TV as the output
device, as per the "Troubleshooting" section of that wiki page.  I
would suggest one or both of these is needed:

Option "UseDisplayDevice" "DFP-1"
Option "ConnectedMonitor" "DFP-1"