Full RGB quantization range over HDMI, with latest drivers

[NTørr]

I have just setup at new NUC8i3BEK with Iris Plus 655, running the latest Windows 10 May 2019 version and graphics driver version 26.20.100.7000. I have it connected to an LG OLED B7 over HDMI. The black level on my TV is set to high, but I cannot get my NUC to output full RGB, so the blacks are just grey!

According to this support document, you should be able to set the quantization range to full; https://www.intel.com/content/www/us/en/support/articles/000029572/graphics-drivers.html, but this is no longer an option in the new settings interface.

Can someone please help, because this really sucks?

Setting the black level to Low, does work, but looses some details in black gradients. When setting it to auto, it just chooses High, so the graphics driver must be sending incorrect information to the TV!

[AndrewG_Intel]

Hello NTørr,

Thank you for posting on the Intel® communities.

In order to better assist you, could you please provide the following information?

1- Are you using Intel® Graphics Control Panel or Intel® Graphics Command Center trying to set Full RGB Quantization Range?

2- Please provide an Intel® Graphics report.

• If using Intel® Graphics Control Panel go to "Options and Support >> Information Center" and Select Save and name the output file.

• If using Intel® Graphics Command Center, please click on "Support" (question mark icon) >> System Diagnostic, and click on "Generate Report".

To attach a file to this thread, you must click the “Attach” option on the bottom left-hand corner of the response box.

Andrew G.

Intel Customer Support Technician

A Contingent Worker at Intel

[NTørr]

Hi Andrew

1: I'm using the Intel Graphics Command Center (the Graphics Control Panel does not seem to be part of the latest drivers)

2: I've attached my system report. I've noticed the the report says that I'm connected using DisplayPort, but this is of course incorrect.

Thanks for helping out

[AndrewG_Intel]

Hello NTørr,

Thank you for your response.

Based on the article you previously checked "Quantization Range Option Is No Longer Visible on the Intel® Graphics Control Panel", with the most recent drivers (xx.xx.100.xxxx and newer) this option will only be visible if the video output on your computer is native HDMI.

The HDMI® 2.0a output on the Intel® NUC Kit NUC8i3BEK is enabled by an LSPCON chip (DP 1.2 to HDMI® 2.0a protocol converter). This explains why the output is shown in the Intel® Graphics report as "DisplayPort". This information in the report is correct.

Details regarding LSPCON can be found on the Technical Product Specifications, section 1.5 Processor Graphics Subsystem:

https://www.intel.com/content/dam/support/us/en/documents/mini-pcs/nuc-kits/NUC8i3BE_NUC8i5BE_NUC8i7BE_TechProdSpec.pdf

However, since the article only refers to Intel® Graphics Control Panel, I would like to test this in our lab using the Intel® Graphics Command Center.

I will be posting back as soon as I have more details.

Andrew G.

Intel Customer Support Technician

A Contingent Worker at Intel

[NTørr]

As a sidenote, my previous NUC was a 6th gen model which only had HDMI 1.4 so I used a DisplayPort to HDMI 2.0 adaptor, and I also had a similar issue. But there was a workaround by setting Video input range in the Graphics Control Panel (Found the solution here: https://forums.intel.com/s/question/0D50P0000490Xz2SAE/cannot-get-full-rgb-quantization-range-over-native-displayport-on-hd-630-integrated-graphics). But after updating to the May 2019 Windows 10 update, this no longer worked, and I reverted it back, and I have not tried since.

Part of the reason I upgraded was to avoid having to use the dongle, and I thought the HDMI port was natively supported, and that I would be able to output full RGB without any issues :( 

I’m not quite sure I understand why the option for full RGB range is not an option when using DisplayPort to HDMI, as it only seems to be a software limitation?

[AndrewG_Intel]

Hello NTørr,

Thank you for your response and the details regarding the previous Intel® NUC 6th generation, as well for the reference thread.

I am still working on the lab to try testing this with Intel® Graphics Command Center and I will be getting back with details as soon as possible.

Andrew G.

Intel Customer Support Technician

A Contingent Worker at Intel

[AndrewG_Intel · Accepted solution]

Hello NTørr,

Thank you for your patience on this matter.

After performing a lab I would like to share the following findings:

1- During the transition from Intel® Graphics Control Panel to the new Intel Graphics Command Center, Quantization Range Option is not available in Intel Graphics Command Center yet but should be available in future releases. I have documented this so the product team can review it.

2- The Quantization Range Option is still available in the Intel® HD Graphics Control Panel and it works on the 8th generation Intel® NUCs even with this LSPCON chip since it will work in level-shifter mode.

3- I tested this in our lab using an Intel NUC Kit NUC8i7BEH which has the same Intel Iris Plus Graphics 655 video card as your Intel® NUC Kit NUC8i3BEK, and tested with Intel® Graphics Control Panel which I downloaded directly from Microsoft® Store, I tested with both drivers, the latest driver validated for the NUCs 26.20.100.6912 and the generic driver for Intel® Iris® Plus Graphics, version 655 26.20.100.7000.

4- Please download the Intel® Graphics Control Panel from Microsoft® Store and install it on your Intel® NUC, launch the application and refer to Display >> General Settings >> Quantization Range, the option should be available. Please let me know the outcome.

https://www.microsoft.com/en-us/p/intel-graphics-control-panel/9ndlclmmtmrc?activetab=pivot:overviewtab

Note: This link is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.

As an aside note, the customized and latest driver validated for the Intel® NUC Kit NUC8i3BEK is Version: 26.20.100.6912. Driver version 26.20.100.7000 is just one of the generic drivers for Intel® Iris® Plus Graphics.

Should you have additional inquiries, please let me know.

Andrew G.

Intel Customer Support Technician

A Contingent Worker at Intel

[NTørr]

Thanks Andrew

Using the Graphics Control Panel did the job, I had no idea it was just available for download on the Microsoft store :)

[AndrewG_Intel]

Hello NTørr,

Thank you for your response.

I am glad to know that using the Intel® Graphics Control Panel you were able to set Quantization Range Option.

We will close this inquiry, but if you need further assistance, please post a new question.

Andrew G.

Intel Customer Support Technician

A Contingent Worker at Intel