topic Re: Feature Request - implement EDID override in Graphics

Feature Request - implement EDID override

idata — Sun, 23 Oct 2011 17:15:52 GMT

Hello,

it would be nice if the Intel Graphics driver would support overriding EDID information like described in this document from Microsoft:

http://msdn.microsoft.com/en-us/windows/hardware/gg487330 http://msdn.microsoft.com/en-us/windows/hardware/gg487330

Why is this needed?

In a common HTPC (multimedia PC) setup with a PC, AVR (audio video receiver) and a television, the EDID information stored in the receiver & television that is passed to the PC determines the video and audio capabilities like: supported resolutions, supported audio formats etc ..

The problem is that very often the system only "sees" the EDID information of the television, and not that of the receiver, and so you don't get support for audio formats like DTS, DTS-HD, Dolby TrueHD that are supported by the receiver ...

The latest Sandy bridge CPU and corresponding chipset support all these sound standards, but they often not useable cause of these EDID problems.

Actually it really does not matter what video card / integrated graphics you use, NVidia and AMD graphics have the same problem, but their drivers

allows people to override the EDID information like is described in the above linked document from Microsoft.

Please implement this stuff, shouldn't be that hard to do, for one of you senior driver programmers it's probably just a few hours of work ...

Thank you

Christian

Re: Feature Request - implement EDID override

Allan_J_Intel1 — Mon, 24 Oct 2011 16:22:34 GMT

Hi there!

Your feedback is important to us and I thank you for taking the time to communicate this issue.

Thanks

Allan.

Re: Feature Request - implement EDID override

SHick1 — Tue, 20 Nov 2012 18:49:40 GMT

I continue to experience this issue. When will intel support EDID Override?

Re: Feature Request - implement EDID override

idata — Wed, 21 Nov 2012 11:50:25 GMT

Currently I am using the very expensive Gefen HDMI Detective Plus to do the job of constantly providing the same EDID info to the HTPC. However, overriding it with an INF file (for example generated by MonInfo) would be a much more elegant solution.

Re: Feature Request - implement EDID override

TMill18 — Sun, 29 Sep 2013 20:47:59 GMT

Any progress on this? I'm really struggling to get my expansive HTPC to work properly with a connected Marantz AVR. A simple EDID override feature would help me greatly.

Re: Feature Request - implement EDID override

KHave — Sun, 12 Jan 2014 12:43:41 GMT

Well, this would be an easy thing for Intel fix which would fix a lot of negative experience with their products when used as HTPC. So looking forward to see this one closed soon.

Re: Feature Request - implement EDID override

JTerr5 — Thu, 18 Dec 2014 11:02:26 GMT

Intel: PLEASE STOP IGNORING THIS ISSUE!!! BOTH AMD AND NVIDIA ALLOW THIS. SO PLEASE GET YOUR BIG BOY PANTS ON AND ALLOW THIS FEATURE! HOLY SHIT!

I will NEVER buy another Intel product ever again because of this issues.

Re: Feature Request - implement EDID override

PB7 — Wed, 24 Dec 2014 16:10:52 GMT

Great work ignoring this Intel.

Re: Feature Request - implement EDID override

RSyne — Sun, 04 Jan 2015 15:51:56 GMT

I also suffer from this issue. I purchased a very expensive Gigabyte Brix I4770R running Intel 5200 Iris Pro. I have this connected to an LG 5.1 amp that should play 5.1 and does via XBOX 360 and Virgin Media Cable Box. The LG amp is connected to an LG 42" TV that only supports 2 channel stereo and it's this restriction that is being picked up by the Intel card and causing windows 8.1 to restrict my sound to 2 channel.

I used to run an Acer Revo (NVIDIA ION) and this worked fine where I could set the sound to 5.1 in Windows.

Reading up on the issue it appears I am limited to using an expensive hardware splitter/switch that spoofs the EDID, running an optical cable to the amp (old school) , trying to hack the registry (really???), or waiting for Intel to implement what appears to be a MUST HAVE feature in their driver set. I can't believe it isn't part of it already.....

The upside is that you can force 5.1 in Netflix and the amp does pick up the audio stream but not all apps offer this functionality.

Re: Feature Request - implement EDID override

RSyne — Sun, 04 Jan 2015 15:54:35 GMT

O I forgot.... I could buy a new £1000 Sony TV that does support 5.1

*looks at the wife*

Re: Feature Request - implement EDID override

loldf — Tue, 07 Apr 2015 05:01:08 GMT

Seriously Intel. This is ridiculous. Add support for EDID override!

err... open source?

Does the hardware support the edid being injected via software???

Re: Feature Request - implement EDID override

loldf — Tue, 07 Apr 2015 05:12:17 GMT

Looks like the clone_update_edid has the capability of reading an EDID from one display and "cloning" it to another within the intel graphics driver...

hmm..z

static void clone_update_edid(struct clone *clone)

{

unsigned long nitems, after;

unsigned char *data;

int format;

Atom type;

if (XRRGetOutputProperty(clone->dst.dpy, clone->dst.rr_output,

XInternAtom(clone->dst.dpy, "EDID", False),

0, 100, False, False, AnyPropertyType,

&type, &format, &nitems, &after, &data) == Success) {

XRRChangeOutputProperty(clone->src.dpy, clone->src.rr_output,

XInternAtom(clone->src.dpy, "EDID", False),

type, format, PropModeReplace, data, nitems);

}

from xf86-video-intel-2.99.917/tools/virtual.c

one could say, import a known edid.bin and inject it into a screen? therefor forcing it to a particular mode..

any avid xf86 driver coders available?

Re: Feature Request - implement EDID override

loldf — Tue, 07 Apr 2015 05:22:55 GMT

1) Add OPTION_EDID_OVERRIDE to intel_options.h

2) Add OPTION_EDID_OVERRIDE to intel_options.c with "OverridEdid", OPTC_STRING, {0}, 0

more later.. come on Intel lets get this edid overriden! it looks like you've already written EDID cloning from one output to another... so it must be supported

Re: Feature Request - implement EDID override

loldf — Tue, 07 Apr 2015 14:29:54 GMT

checkout the github.

https://github.com/ArakniD/IntelGraphics https://github.com/ArakniD/IntelGraphics

It now has a option in xorg.conf for;

Section "Device"

Identifier "Device 1"

Driver "intel"

Option "EDIDOverride" "/home/lucas/sony.edid"

EndSection

if the file doesn't exist it'll create it the first time assuming everything is connected OK.

the next time it'll load the file instead.. handy? ;0 I think so!

7776.574] (==) intel(0): Depth 24, (--) framebuffer bpp 32

[ 7776.574] (==) intel(0): RGB weight 888

[ 7776.574] (==) intel(0): Default visual is TrueColor

[ 7776.574] (**) intel(0): Option "EDIDOverride" "/home/lucas/sony.edid"

[ 7776.574] (II) intel(0): Output HDMI1 has no monitor section

[ 7776.574] (II) intel(0): Enabled output HDMI1

[ 7776.574] (II) intel(0): Output DP1 has no monitor section

[ 7776.574] (II) in

Now i'm still having an issue with a blank screen if I turn off the AVR and TV. I hope to resolve this with some further digging.

Re: Feature Request - implement EDID override

loldf — Tue, 07 Apr 2015 14:32:57 GMT

its 12:31AM and I must sleep... i've reset my AVR with the TV on and the screen came back up ok.. the screen was previously off but the audio came back on ok.

it would appear that its working ok now with an edid override option ;0

w00t

Re: Feature Request - implement EDID override

loldf — Tue, 07 Apr 2015 22:55:04 GMT

added bug to bug tracker.. perhaps this will get to the correct place now.

https://bugs.freedesktop.org/show_bug.cgi?id=89945 https://bugs.freedesktop.org/show_bug.cgi?id=89945

Re: Feature Request - implement EDID override

ROBERT_U_Intel — Wed, 08 Apr 2015 21:31:18 GMT

All,

We are currently evaluating the addition of this feature. Please watch this thread for updates.

Thanks

Robert

Re: Feature Request - implement EDID override

MGall11 — Wed, 22 Apr 2015 20:39:44 GMT

Hi Robert,

Excellent news! Has there been any progress/movement on this since?

Re: Feature Request - implement EDID override

loldf — Wed, 22 Apr 2015 21:13:58 GMT

I'm working through a bug report via bug tracker for intel graphics. There is a bug in either DRM or xf86 driver around hot plugging.

Also the edid override via DRM is supported in kernel 4.0+. Its not in the stable release yet for Ubuntu.... Some bug fixed that makes the DRM option force edid for a screen in that kernel module...

That said, my hack works perfectly 😉

Allows override and keep the screen working after power cycles.. So hack away sir

Re: Feature Request - implement EDID override

MGall11 — Thu, 23 Apr 2015 13:20:30 GMT

Thanks for the feedback, good info! I really need this on a Windows platform and a stable/official release would do wonders. One can only hope!