topic Re: HD4600 UHD Displayport MST in Graphics

HD4600 UHD Displayport MST

safas — Mon, 20 Oct 2014 18:17:07 GMT

Hi!

I have a Panasonic TX-65AXW804 UHD TV and I connected it via displayport to my pc.

The problem is that with UHD (3840x2160) resolution I can only select 60Hz. But the TV can also 24Hz and so on.

At 1920x1080 I can select all refresh modes but the TV stays black.

When I switch the displayport to SST on the TV side, I can select all modes correctly according to the specs:

All FullHD modes and UHD at 30Hz (maximum for single stream) and it works.

With older drivers, the PC show me the TV as 2 different Monitors.

So it looks like the driver dont detect the TV correctly in MST mode.

Re: HD4600 UHD Displayport MST

Allan_J_Intel1 — Tue, 21 Oct 2014 14:31:44 GMT

Thanks for joining the Graphics community.

Please check this post for similar information about this matter:

Allan.

Re: HD4600 UHD Displayport MST

safas — Tue, 21 Oct 2014 17:14:08 GMT

Noup. Its not the same problem. 3840x2160@60Hz IS working correctly! LOWER freuqencies are not available. Thats my problem!

The other problem is that all 1920x1080 modes not working correctly (Screen stays black, wrong signal). With older driver they are working correctly

(1080p60/50/24).

Re: HD4600 UHD Displayport MST

ROBERT_U_Intel — Tue, 28 Oct 2014 20:22:59 GMT

@ Seppdog, could you please provide the full EDID data from your display? You can use a tool such as the free one provided by EnTech found here:

http://www.entechtaiwan.com/util/moninfo.shtm EnTech Taiwan | Utilities | Monitor Asset Manager

Thanks

Robert

Re: HD4600 UHD Displayport MST

safas — Tue, 28 Oct 2014 21:29:10 GMT

Here we go...

kind regards

Seppdog

Re: HD4600 UHD Displayport MST

ROBERT_U_Intel — Thu, 06 Nov 2014 17:35:56 GMT

Thanks Seppdog, we are continuing to investigate the issue.

Thanks

Robert

Re: HD4600 UHD Displayport MST

safas — Thu, 15 Jan 2015 19:29:19 GMT

New driver, same problem...

Why is it so hard to fix a simple EDID problem!?

My old notebook with Ivybridge gets the correct information from the TV. With the complete same setup.

I dont understand this....

Re: HD4600 UHD Displayport MST

ROBERT_U_Intel — Wed, 21 Jan 2015 20:24:54 GMT

Hi Seppdog

We are still investigating the issue. I will update this thread when I have additional updates.

Thanks

Robert

Re: HD4600 UHD Displayport MST

ROBERT_U_Intel — Mon, 26 Jan 2015 20:33:04 GMT

Hi Seppdog

For some reason the EDID you posted was truncated. Could you try this please? Open a Command Prompt window and run "dispdiag" and post the data file created here. I will be able to get full EDID info from it.

Thanks

Robert

Re: HD4600 UHD Displayport MST

safas — Tue, 27 Jan 2015 20:02:26 GMT

hopefully the file is ok

Re: HD4600 UHD Displayport MST

safas — Wed, 28 Jan 2015 21:14:35 GMT

Sorry. I have send you the diag while HDMI was active.

now witch DP...

Re: HD4600 UHD Displayport MST

ROBERT_U_Intel — Wed, 28 Jan 2015 22:09:14 GMT

Thanks Seppdog.

Robert

Re: HD4600 UHD Displayport MST

safas — Wed, 13 Jan 2016 20:02:27 GMT

Hi!

I'am waitng now for more than one year!!! for a solution!

At the moment I have the latest hd graphigcs driver installed, but I have always the same problem:

Via Displayport MST I can not show 4k content in all refreshrates (60p/50p/24p). Its definitely a EDID problem.

How long I have to wait for a correct working driver?

kind regards

Re: HD4600 UHD Displayport MST

safas — Tue, 02 Feb 2016 15:28:31 GMT

Bump

Re: HD4600 UHD Displayport MST

safas — Tue, 08 Mar 2016 10:00:00 GMT

Is there nobody out there who is using 4k via DP with a TV?

Re: HD4600 UHD Displayport MST

Bryce__Intel — Fri, 15 Apr 2016 22:10:25 GMT

Hi Seppdog

The Debug Engineer is asking for some info let me know what the result is. Pass/Fail - Same/Different

Use current release driver on Intel.com (15.36 4332 as of 4/14/16)
Connect only the 4k TV in MST mode
Check both CUI and OS Display Properties to see if 3840x2160 23\24Hz are missing
Recapture Dispdiag logs
Check if there are any firmware updates for their TV on the manufacturer's websites.

Re: HD4600 UHD Displayport MST

safas — Wed, 20 Apr 2016 18:40:27 GMT

This is not possible with this driver.

The screen stays black.

Re: HD4600 UHD Displayport MST

Bryce__Intel — Wed, 20 Apr 2016 18:51:48 GMT

Which number are you responding to?

Re: HD4600 UHD Displayport MST

safas — Wed, 20 Apr 2016 19:15:55 GMT

I cant do the testing procedure.

I have installed the .4332 driver, switched the TV to Displayport MST and the TV stays black.

So, I dont know if the 24p option is missing on CUI and OS and also I cant send you the dispdiag logs...

If you mean the message number: 15

Re: HD4600 UHD Displayport MST

Bryce__Intel — Wed, 20 Apr 2016 19:27:02 GMT

Thanks, is there a newer firmware for the television? Which are you currently using?

Do you have two DP cables plugged in to support MST?