Intel Iris Xe graphics not compatible with 10 bit 4k monitor?

Amoens · ‎11-07-2022

Hi all,

So I've recently bought a Samsung LU28R550UQRXEN 4k 10-bit monitor and a Samsung Galaxy Book2 15 NP750XED-KB2NL, with Intel Iris Xe graphics. As you can see in the image provided current output is 4K/8-bit/60hz.

I can change settings in the Intel graphics command center to RGB/YCBR_420/444. Changing to RGB allows me to select 10-bit display, however the maximum resolution then drops to FullHD.

Is there a way to get 4k/10-bit/60hz? Currently connecting laptop to monitor using the HDMI cable that came with the monitor (assuming that is 2.0 HDMI?), so should not be the issue.

Thanks and kind regards,

Aaron

AndrewG_Intel · ‎11-08-2022

Hello @Amoens

Thank you for posting on the Intel® communities.

In order to review this further, could you please provide us with the following details?

1- Because you seem to be able to change "Color Depth and Color Format" on the Intel® Graphics Command Center, we're assuming that you are using HDMI. Is this correct?

2- We were unable to find an official datasheet or webpage with the technical specifications for the system model "Samsung Galaxy Book2 15 NP750XED-KB2NL" but only for similar variations (e.g.: Samsung Galaxy Book2 15 NP750XED-[XXXXX]). Therefore, by any chance do you know the HDMI standard of the video connector on your computer (if applicable)? For instance, it is HDMI 1.4, 2.0, or 2.1?

3- We understand that you bought these devices recently. Is the behavior occurring since the first day that you have this configuration (laptop + type of cable/connectors + monitor)?

4- Please provide a Report for Intel® Graphics Drivers following the steps on the link. Make sure the monitor in question is connected to the computer when running the report.

5- Run the Intel® System Support Utility (Intel® SSU) to gather more details about the system:

Download the Intel® SSU and save the application on your computer
Open the application, check the "Everything" checkbox, and click "Scan" to see the system and device information. The Intel® SSU defaults to the "Summary View" on the output screen following the scan. Click the menu where it says "Summary" to change to "Detailed View".
To save your scan, click Next and click Save.
Once you have saved the file (.txt file), please attach it to your reply.

To upload and attach a file, use the "Drag and drop here or browse files to attach" option below the response textbox.

Best regards,

Andrew G.

Intel Customer Support Technician

Amoens · ‎11-08-2022

Thanks Andrew for your response.

1. Yep using HDMI. Tried connecting screen with laptop trough HDMI-usbC converter: then max performance drops to RGB 8-bit, 4k, 30fps. With HDMI-HDMI max refresh rate in RGB and ycbcr444 is also 30hz, in ycbcr420 it is 60hz.

2. ''Samsung Galaxy Book2 15 NP750XED-KB2NL'' most likely is the Dutch name (as NL stand for Netherlands). Anyways, it is the Samsung Galaxy book 2, 15,6'', I7, intel iris xe, 512 gb ssd. I looked for the HDMI port for ages, samsung page does not mention it anywhere. Assuming 2.0? HDMI port on the monitor is 2.0.

3. Yes, haven't managed to get 4K/10-bit/60Hz (or even 30hz) from start. In RGB I can go to 10-bit/30hz but resolution drops to fullHd.

4/5. see below.

Thanks!

Aaron

Amoens · ‎11-08-2022

Turns out I did not have the most recent Intel driver installed! Updated to 31.0.101.3790 and I'm now able to get 10-bit, 4K, HDR, 60 fps in YCbCr420. In YcbCR420/RGB I can manage 10-bit, 4K but only 30 fps. What would be the recommended settings?

Kind regards, Aaron

powerarmour · ‎11-08-2022

I normally can't amend colorspace settings via DisplayPort on either of my Xe devices (Arc A770 and i7-1165G7), but you can via HDMI, so a choice between VRR or Color, but not both... but hey.

HDMI/RGB is generally preferable to YCbCr, but YCbCr420 is fine if the bandwidth allows 60Hz instead of 30Hz, that's a no brainer. 🙂

AndrewG_Intel · ‎11-09-2022

Hello Amoens

Thank you for your response.

Just to make sure, is the issue resolved after installing the latest graphics driver? Or do you still need assistance?

We are asking this because it is not clear if you have already achieved the desired configuration:

You first stated that "I'm now able to get 10-bit, 4K, HDR, 60 fps in YCbCr420". But then you mentioned, "In YcbCR420/RGB I can manage 10-bit, 4K but only 30 fps".

Therefore, is it your goal to achieve 4K (3840x2160) at 60Hz, color depth set to "BPC_10", Color Format set to "YCBCR_420", and HDR "On"? Were you able to get the desired configuration?

Best regards,

Andrew G.

Intel Customer Support Technician

Amoens · ‎11-10-2022

Ah, sorry for the misunderstanding. Yep, got it running in 4K/10-bit/HDR/YCbCr420.

In YCbCr444/RBG I can only get 4K/10-bit/HDR at 30 fps, but I guess thats limited by the bandwith of HDMI 2.0.

Ill run it in YCbCr 420 then.

Thank you!

Aaron

Jean_Intel · ‎11-11-2022

Hello Amoens,

Thanks for your response.

You should consider that using Chroma supersampling 4:2:2 reduces the bandwidth used by the system. The HDMI 2.0 bandwidth is 18 Gbps, and the bandwidth needed to run 4k (3840x2160), 10-bit, at 60hz is 17.92 Gbps; the calculation is based on this website, and keep in mind that this website does not take into consideration Chroma supersampling. Your assumption of being limited by the bandwidth of HDMI 2.0 may be correct.

However, as you mentioned that you have achieved your goal of running 4k/10-bit/60hz, I will close the thread now. If you need additional information, please, submit a new question, as this thread will no longer be monitored.

Best regards,

Jean O.

Intel Customer Support Technician

AndrewG_Intel · ‎11-15-2022

Hello Amoens

We are glad to know that you were able to get 4K/10-bit/HDR/YCbCr420(YUV420) after updating the graphics driver.

Also, before closing the thread, if we may add more input to the information provided by Jean, we would like to inform you that your assumption of being limited by the bandwidth of HDMI* 2.0 is correct.

Intel® Graphics supports 10-bit and 12-bit color depths and the Intel® Core™ i7-1255U Processor supports 4096 x 2304 @ 60Hz as the maximum resolution over HDMI¹.

The 4K mode of 2160p@60Hz in 10/12-bit mode with HDR ON only supports up to YUV420 over HDMI* 2.0 due to bandwidth and GPU limitations.

2160p@60Hz RGB/YUV444 in 10/12-bit mode with HDR ON is not supported over HDMI 2.0 and it will require DisplayPort* (DP) 1.2 or 1.4. For further reference, you may review the table in the following article: Can Intel® Graphics Support 10-Bit Color Depth?

Having said that, we'll proceed to close this thread now. It has been a pleasure to assist.

Best regards,

Andrew G.

Intel Customer Support Technician

Note 1:

System or device display resolution is dependent on multiple system design factors; actual resolution may be lower on your system. Consult with your computer manufacturer for details.

bryanlakatos · ‎11-16-2022

Tagging onto the OP's question, I have a Lenovo ThinkBook with Intel Iris Xe graphics and an i7-1255U. I'd like to run 8-bit 4k@60Hz YcbCr444 but do not require HDR. Assuming I'm using a compatible display, what are the possible ways to get there? Does Iris Xe (or just the plain old bandwidth calculation) support this over HDMI? Is HMDI 2.1 an option? How about via Thunderbolt, which this laptop also has?

Before I go hunting for a TV to purchase, I'd like to see if it's even a possibility to run 4k@60Hz 4:4:4 with this laptop.

Thanks!