Intel HD 620 not supporting HDMI 2.0a?

[rrivv]

Hi there,

maybe someone here can help me...

I'm on a laptop:

* Razer Blade Stealth 2016

* Windows 10 64-bit

* Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz

* Intel(R) HD Graphics 620 (driver version 21.20.16.4494)

* HDMI 2.0a

trying to connect to external display Iiyama XB2779Q:

* 2560 x 1440 @60Hz via DVI-D or DisplayPort

using different HDMI-DVI adapter cables wich seem to work fine for other people.

Via Intel Graphics Settings, I can create custom resolutions, e.g.:

* 2560 x 1440 @30Hz GTF

- unfortunately, the display is not compatible with 30Hz, so this does not work.

When I try to select the custom resolution

* 2560 x 1440 @60Hz GTF

- the message I get from the Intel application reads "the custom resolution exceeds the maximum bandwidth capacity" and won't let me save it.

I have tried various combinations of refresh rates and timing standards, but either the required bandwidth is "too high" (and I can't create the setting), or the frequency is too low (and my display won't accept it).

In principle:

* HDMI 2.0a should be able to transport the required bandwidth

* Intel HD620 should be able to work with HDMI 2.0(a) (via some LS-Pcon workaround that is mentioned in the datasheet)

* the HDMI-DVI adapter cable should be able to transport / translate the required bandwidth (it's doing so for other people / systems)

* the display should support 2560 x 1440 @60Hz

So, what am I missing?

I've already tried various versions of the Intel drivers, but maybe not the correct ones...?

Help, please...

[idata]

Hello rivvyn,

Thank you for contacting the Intel community. I can see that you have an old graphics driver, there is a new generic driver that you can try; you can download it here:https://downloadcenter.intel.com/download/26941/Graphics-Intel-Graphics-Driver-for-Windows-15-46-?product=96551 https://downloadcenter.intel.com/download/26941/Graphics-Intel-Graphics-Driver-for-Windows-15-46-?product=96551 before installing this driver, uninstall the old driver and then install the Intel® generic driver manually, please see how to https://www.intel.com/content/www/us/en/support/graphics-drivers/000005629.html Manually Install an Intel® Graphics Driver in Windows® 10 and Windows 8*/8.1* Please let me know how it goes after you install the new version. Best regards, Ivan U.

[rrivv]

Hello Ivan,

Thank you very much for your answer.

I did as you told me and now ended up with version 22.20.16.4729 of the Intel drivers.

(Whyever it said 15.46.02.4729 at the download link and things don't correspond now, I do not know...)

Unfortunately, this does not seem to change anything:

* the largest working resolution for the external display is 2048 x 1152 @60Hz

* the largest custom resolution I am allowed to create is 2560 x 1140 @40Hz (and still not supported by the monitor).

It is still not possible to create custom resolutions at 2560 x 1140 @60Hz.

Best regards,

Annika.

[rrivv]

So - various re-installations and restarts did not change anything.

In the data sheet for my processor, it says:

"HDMI 2.0/2.0a support is possible using LS-Pcon converter chip connected to the DP port."

I know that my laptop is supposed to feature HDMI 2.0a via this workaround, so I guess that the respective driver / firmware is defective / not there.

For the NUC things, you offer firmware upgrades: https://downloadcenter.intel.com/download/26609/NUCs-HDMI-2-0-Firmware-Update-Tool-for-Intel-NUC-Kit-NUC6CAY-and-NUC7i3BN?product=95069 https://downloadcenter.intel.com/download/26609/NUCs-HDMI-2-0-Firmware-Update-Tool-for-Intel-NUC-Kit-NUC6CAY-and-NUC7i3BN?product=95069

Might there be anything similar for the hd620 - or at least some diagnostics?

As it all seems to be part of 'display adapters' drivers, the problem is really hard to address...

[idata]

This firmware for HDMI 2.0 is mostly for Intel® NUCs and is for the HDMI firmware not for the Intel® HD Graphics 620, the driver for the graphics is the one I posted above that you already have installed.

From our end, with this OEM (Original Equipment Manufacturer) system we can help you providing you with drivers but if the issue is more deeper I suggest you to contact your system manufacturer, they have specifics software and updates for your system, they can limit your system with specific features that we are not aware, you can try contacting them for you to update the BIOS, updating the BIOS can help you solve issues like this. Try posting this problem at their community site:https://www.razerzone.com/gaming-systems/razer-blade-stealth https://www.razerzone.com/gaming-systems/razer-blade-stealth Regards, Ivan U.

[rrivv]

Hello again,

I have now tested laptop and cables with other displays, and the HDMI 2.0a part (desired resolution and frequency, also with the HDMI -> DVI adapeters) works perfectly well.

Thus, it seems to be a problem with the display itself.

(As the specifications of all devices said it should work, and as I had previously gotten some error messages during the installation of the Intel drivers, I suspected the latter...)

I am sorry to have bothered you.

Best regards,

Annika.

[idata]

Thank you for taking your time to let us know and I'm glad that you were able to find the root cause of the issue.

I hope you can have a better experience with your system from now on. Best wishes, Ivan U.

[rrivv]

See here:

The problem was now 'solved' by using a HDMI -> DisplayPort adapter:

https://www.amazon.de/dp/B00WM6MPGC/ref=pe_3044161_185740101_TE_item https://www.amazon.de/dp/B00WM6MPGC/ref=pe_3044161_185740101_TE_item

Using this, the display works at the desired resolution / bandwidth using the Windows Display settings (no custom Intel resolutions needed).

However, using XB2779-QS with _Intel HD 620_ via DVI still does _not_ work - and the artificial restraint of creating the desired resolution ("bandwidth capacity exceeded") in the Intel Graphics Settings just plain _sucks_.

Regards,

Annika.

[idata]

Thank you for the information it is very much appreciated.

Basically for Intel® graphics for you to get the resolution you wish we strongly recommend HDMI or DP. Best regards, Ivan U.

[idata]

Hello rivvyn,

I just want to let you know that since you are trying to use DVI-D dual link cables, please bear in mind that our Intel® graphics do not support DVI-D dual link port/adapter/cable and for that reason you will not be able to get the resolution you wish. I can see that on the other thread you got some explanation about it, I apologize for any inconvenience and I'm sorry I missed to ask you if the adapter was DVI-D dual link. I'm sorry again for the misunderstood. Best wishes, Ivan U.