Intel NUC6i7KYK
Display: 4K 60Hz
Iris Pro GFX 580 Version: 24.20.100.6025
HDMI Ports & Cables: 2.0 w/ HDCP 2.2
Browser: All of them
Intel HDMI Firmware Updater Version: 0x07_0x20
ISSUE #1: If I click a movie's page on Amazon Prime, display goes blank every time. Screen shows "No signal detected". It won't display anything again until I Shut Down/Hibernate the NUC. Removing the HDMI cables or turning off TV won't solve problem. I've noticed this only seems to happen on sites with DRM content. A few examples are: 1, 2, and 3. Tried GFX update version 24.20.100.6136 and same problem. Currently experimenting with 21.20.16.4860, but it's just as bad so far. It appears the only way to ensure the display doesn't go blank (in FireFox) is to disable the Widevine Plug-in. But then Amazon won't allow movie streaming at all. To watch a film, I must enable DRM/Widevine, Hibernate, Power back up, then the page suddenly works fine until I click away. What leads me to believe this is a NUC graphics issue is that it happens regardless of browser, and only on my 4K display. NUC also completely froze up on YouTube videos a couple times. None of this happens with my 1080p display connected. Nor does it happen when my 4K TV resolution is set to 1080p. Any suggestions? I'm currently awaiting response from Amazon also.
ISSUE #2: HDCP 2.2 devices not recognized by Amazon (again) at 4K 60Hz. This issue occurs no matter what version graphics firmware I use. But if I decrease the display frequency to 30Hz, HDCP videos suddenly work as they should. And again, they also work fine if I decrease the 4K TV's resolution to 1080/60. I'm hesitant to believe this is proper functioning.
I'm pretty certain the two issues are related through the Pro 580's processing of 4K graphics, but not sure how/why. If anyone knows of other websites with CRM/HDCP 2.2 mandated videos where I can compare to Amazon, I'm all ears. Don't have access to NetFlix though.
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ADDITIONAL INFO AS PER DAVID's REQUEST FOLLOW BELOW:
Issue #1 Occurrence: Always (4K settings dependent)
Issue #2 Occurrence: Always (4K settings dependent)
CPU: Intel i7-6770HQ
Display Model: TCL 55S405 4K LED TV (Single Display Layout)
RAM: 16GB DDR4
HDMI Cable: Twisted Veins High Speed Cable
Hardware Stepping: ~See Attached~
OS: Windows 10 Pro (10.0.16299)
VBIOS: ~See Attached~
AC/DCAdapter: Delta ElectronicsADP-120RH D
SSU: ~See Attached~
DxDiag: ~See Attached~
DispDiag: ~See Attached~
Steps To Repro:
1. Have NUC6i7KYK Graphics set to 3840x2160 @ 60Hz and connect to a 4K display
2. Use FireFox (60.0.2) or Microsoft Edge to navigate to Amazon.com
3. Sign-In and navigate to a Prime Movie page with DRM Content (DRM Enabled in Browser)
*For step 3, example links are in "Issue #1" paragraph above.
**Steps to reproduce "Issue #2" are the exact same as above. Then on a selected movie's page, attempt to play film.