HD 530 / i7-6700K: 4k60p won't work at HDMI 2.0 on Windows

[PNaum]

Category

Questions

Answers (N/A if not applicable)

Description

Provide a detailed description of the issue

I am not able to get my dual Monitor Setup to work properly.

The 1st Monitor is plugged into the DP1.2

The 2nd Monitor is plugged into the HDMI 2.0.

DP 1.2 is operating fine 4k60p

HDMI 2.0 is only working until 4k30p, everything above 30p will not be displayed at the 2nd LG Monitor.

I've used the following Drivers:

Windows OEM Intel Driver: No Success

Newest Intel HD Driver: No Success

Newest Gigabyte Intel HD Drive: No Success

The Megachips HDMI Firmware is up to date @ Version v1.42

HDMI UHD Deepcolor is activated on the HDMI LG Monitor, otherwise the Intel Drive won't Show 4k60p

I've testet also on a Ubuntu 15.10 Live Disk.

Both Monitors are working at 4k60p!

Does it fail every single time, or only sometimes?

If you can offer a % rate please do.

Everytime

Hardware (HW)

Brand and Model of the system.

It's selfmade build

Hybrid or switchable graphics system?

ie Does it have AMD or NV graphics too?

Only Intel HD 530 @ i7-6700K

Make and model of any Displays that are used to see the issue (see note2 below). 

LFP = Local Flat Panel (Laptop panel)EFP = External Flat Panel (Monitor you plug in)

2x LG 27MU67-B

How much memory [RAM] in the system (see note2 below).

64GB DDR4

Provide any other hardware needed to replicate the issue.

ie: Cables&brand, cable type [vga, hdmi, DP, etc], dock, dongles/adapters, etc

Mainboard: Gigabyte GA-Z170X-GAMING 7 EU

DP: Monitor included LG Cable

HDMI: Monitor included LG Cable

<p...

[idata]

Hello:

Let me apologize to all the peers on this thread for any confusion related to the information submitted previously:

The following is actually the escalation response from the debugging team:

This is a MegaChips hardware issue for which a good workaround may not be possible on the Intel Gfx driver side. At this time a Graphics driver workaround for this MegaChips issue is not feasible. Advising to route users to MegaChips for FirmWare update if possible. MegaChips info provided above regarding their cut 2.1 bug. One piece of additional information is that disabling the HD audio controller (not codec) in Device Manager also works, but again takes out both Intel and Creative sound.

[dharr121]

With all due respect, full functionality has been demonstrated in non-Windows OSes, so I don't see how it can be a bug?

[idata]

Hello dustinharris:

This is the results we got from our debugging team:MegaChips info:With BOBCAT LSPCON CUT2.1 (i.e., DPCD Address 00509h = 21h)Case 1: SKL can gen-lock audio samples transport to 4Kp60Hz videoSKL may enable up to 4Kp60Hz in RGB/YCbCr444Case 2: SKL cannot gen-lock audio samples transport to 4p60Hz videoSKL shall keep the TMDS character rate to 340MHz or less so that HDMI2.0 scrambling may be disabled:If a 4K display is capable of 4Kp60Hz in YCbCr420, SKL may choose to transmit 4Kp60Hz in YCbCr444 and have BOBCAT chroma down-sample to YCbCb420Otherwise, SKL shall limit the 4K frame rate to 30HzWith BOBCAT LSPCON CUT2.2 (i.e., DPCD Address 00509h = 22h)SKL may enable up to 4Kp60Hz in RGB/YCbCr444

Any questions, please let me know.

Alberto

[dharr121]

perhaps other OSes are already down sampling the chroma to 4:2:2?

I confirm disabling the audio controller allows 4K60p. That fix is sufficient for me.

[idata]

Hello dustinharris:

Thank you very much for sharing that information on this thread, it should be very helpful for all the peers participating on it. Any questions, please let me know. Alberto

[HMaye]

I have a question: I use windows standard driver 25.01.2016 version 20.19.15.4377 with intel graphics 530.

This is the only driver working when booting windows 10 without my screen (iiyama 40" 4k) staying black on HDMI.

all other driver I tested until newest beta 15.40.26.4474: when windows 10 starts monitor stays black when connected on HDMI.

Can anyone confirm this ? (I have asus z170 delxue board)

[idata]

Hello Economy:

Some of the peers viewing this thread should be able to provide further details or comments about your inquiry. In you need further assistance from Intel, please submit your inquiry on a new thread for us to be able to help you with the specific problem the PC might have. Regards Alberto

[DSeam]

I have the exact same problem:

Gigabyte GA-Z170X Gaming 7. Monitors are LG 27UD88. When connecting both the DP and HDMI cables, neither screen will come up in 4K. I can see the Windows 10 booting sequence, but when it should change to 4K both monitors go to sleep. HDMI firmware is at 1.42, BIOS is F7, and using the recommended Intel driver on the Gigabyte website. I called Gigabyte support, and they escalated the case to Taiwan. None of the workarounds posted here work, so I'm left with only one working 4K display. The HDMI port works fine connected to a Dell 1080P monitor. Please assist, as I bought this rig specifically for dual head 4K displays.

[idata]

I have seen some customer do not have problems with Ubuntu. Why does it work in Ubuntu?

The Windows driver could be enabling a more extensive set of features that the one for Ubuntu, thus stressing to a higher degree the GPU, triggering the issue. I can try to replicate this issue in our lab, however, since I do not have the same Gigabyte motherboard to try it out, it is better to push Gigabyte to replicate it as well, then we can compare the test results to isolate the issue. I can see that two users have the same motherboard Gigabyte GA-Z170X-GAMING 7 EU and here I'm suspecting a motherboard issue. Ivan

[DSeam]

I have reported this problem to Gigabyte. The lady I talked to was just able to take down the symptoms and then forward it to Taiwan for action. I have no idea if they take user complaints seriously. Personally I think it's a driver timing/mode issue, since other users have forced 4K 30Hz and said that worked. The Director at Megachips (the HDMI chip provider) told me he's seen this exact same issue and reported it to Intel but Intel would not commit to a fix. That's unacceptable. I need you to escalate this issue for resolution. I think others in this thread reported the same issue with a Z170 Asus MB that uses the same HDMI MegaChip that Gigabyte does.

[idata]

Thanks for the information; I will further investigate on this issue.

Regards, Ivan

[DSeam]

Any progress on this issue?

[MVyle]

Same problem here.

I am using:

– Gigabyte GA-Z170X-UD5 TH motherboard (BIOS F5) with HDMI 2.0 output (MegaChips MCDP2800 chip, firmware 1.42)– Intel i7-6700K CPU + Intel HD 530– 64 GB DDR4 Kingston HyperX Fury 2133 MHz CL14– 4K UHD monitor Philips BDM4350UC with HDMI 2.0, HDMI 1.4 and DP (1.1, 1,2)– HDMI 2.0 Monster Cable– Windows 10 (64-bit)

I've tried:

– Driver from Gigabyte website Intel VGA Driver 15.40.16.64.4364 (2016-01-18)– Intel driver win64_15.40.22.4424– Intel driver win64_15.40.23.4444

Everything with no success, HDMI 2.0 3840 × 2160 @ 60 Hz is NOT working.

Monitor screen remains black with "No signal" message.

But HDMI 2.0 4K @ 60 Hz works after clean Windows 10 install (without internet connection) when Standard Microsoft Graphics Driver was used.

With internet connection right after Intel HD 530 driver installation screen remains black with "No signal" message.

I can use only HDMI 1.4 input on Philips monitor with 3840 × 2160 resolution and frequency 30 Hz.

Milan

[OG1]

Reading this thread, we can conclude that:

• Ubuntu -> 4k @ 60Hz via HDMI no problems.
• Windows 10 clean install with standard Microsoft Graphics Driver -> 4k @ 60Hz via HDMI no problems.
• With Intel HD 530 driver -> 4k @ 60Hz via HDMI not working.

It is clear that this is Intel graphics driver problem - and it is not a hardware limitation or a hardware issue in anyway. Intel, please FIX ASAP!!

Thanks,

Osho

[DSeam]

And remember that 4K @ 60 Hz works fine with a NVidia card. So it's not a cable, Windows monitor INF file, or monitor problem. I expect Intel to own up to the problem and get it resolved. The OP is almost 6 months old, and just now Intel says they are checking into it. Crazy poor customer service.

[idata]

Hi all,

I'm sorry, unfortunately, I don't have a resolution yet, we are still investigating the issue, once I get a resolution I will POST it here.

[OG1]

Any update on this issue?

Thanks,

Osho

[HMaye]

I have ASUS Z170 Deluxe (HDMI 2.0 and DISPLAY PORT 1.2) and same issues depending on driver version (4377=original windows 10 driver, 4424 and 4444), as I posted above.

Can anyone test if Display Port with Display Port Cable has the same issue on their system?

My result is that the picture (text and graphics) with Display Port 4k 60Hz is much more sharp on Display Port. But display port has problems with Teamviewer, when screen goes off (

[dharr121]

I also have this issue. Same MB, BIOS ver and MegaChips firmware as user _Milan_ (see above in thread) Megachips firmware 1.16 resulted in dropouts, firmware 1.42 results in screen going black and not returning. Have not used Ubuntu but Mac OSX 10.11.5 displays 4K at 60hz completely stable over HDMI 2.0

Hope that helps find a solution.

Dustin

[DSeam]

So what's the latest Intel? Seem to be silent on this issue, which is extremely disappointing. Where has customer service gone???

[DSeam]

I just don't get why Intel is just ignoring this issue. This thread was started 6+ months ago with ZERO action on Intel's part.