I am having the same issue on a Sony TV, Samsung TV, and an Asus monitor on display port. I have adjusted the power settings to never turn off monitor, it still looses the HDMI signal and all 3 devices I have tried need a power cycle to regain the signal.
Could you please let me know the Intel® HD Graphics driver version installed, and the cable model and brand? Please, I would also need from both of you to download the Download Intel® System Support Utility, and attach the report.
My problem is deeper than the sleep issue: the Iris pro is not capable of detecting compatible resolutions from my Sony (KD-43X8300C) or my Samsung (UA40ES6220R).
I have run the HDMI Firmware updater. played around with the HDMI-CEC+ settings in the Samsung and the "Bravia Connect" Settings in Sony.
I have run several other computers via HDMI to these panels: Acer, Alienware, Asus and a Toshiba netbook; They are able to detect the capabilities of the displays and only allow me to select only those detected modes.
Skull Canyon will allow me to select resolutions far beyond the panels' range.
In the Sony: when adjusting my resolution in the windows display preferences box: I went to the max res; it came back to extremely distorted image showing yellow dots moving on the screen, the tv then shut down and had to be cold booted. Checking my Sony specs: the resolution was far beyond the capabilities of the panel. When selecting a compatible resolution (in the windows advance display preferences) it will auto select a refresh rate beyond the capabilities of the panel.
In the Samsung I went to the resolution in windows control panel: and adjusted to 1920x1080, the screen refreshed and now shows black horizontal lines. It appears to have physically damaged capacitors in the HDMI1 input of the Samsung TV.
I make some troubleshooting to understand why I was not able to wake up my NUC with my mouse or keyboard when the message on the screen cable not connected disappear and the monitor enter to sleep mode.
My monitor Acer T232HL is a touchscreen with an integrated USB 3.0 hub. My old desktop was connected to the DVI port and my wireless mouse and keyboard to the hub of the monitor.
I realize when my monitor receives any signal from DVI, VGA or HDMI port, the monitor turn off the touchscreen function and the USB hub to save energy. It’s the reason why I was not able to wake up the NUC with my mouse connected to the hub.
To fix that, I have connected the keyboard and mouse directly to the NUC. Now, I’m able to wake-up the NUC but sometime I lost the sound from the HDMI port and I have to reboot the NUC to have sound again.
I make some testing with my old PC connected to the HDMI port and when Windows enter the monitor to sleep mode everything works fine. No message on the screen about cable not connected and my hub and touchscreen works.
The problem is from the NUC HDMI port; I don’t know if It could be fix with a new driver.
Thank for your help,
Excuse me for my bad English.
Flatfoot, could you please try with the following driver version https://downloadcenter.intel.com/download/25957/Intel-Beta-Graphics-Driver-for-Windows-10-and-Windows-7-8-1-15-40-?product=88357?
OEFVet, hope I can hear from you soon.
Flatfoot, take into consideration that you will need a HDMI 2.0 cable, so please make sure that your cable supports that version. I would also recommend updating your BIOS version to the latest and once you have it install the HDMI 2.0 Firmware Update. See here for the latest BIOS version Download BIOS Update [KYSKLi70.86A], here for the instructions BIOS Update Instructions for Intel® NUC (try the recovery method), and finally see here for the Download HDMI 2.0 Firmware Update.
I am running a NUC6i7KYK connected to a Dell U2713H via the DisplayPort connection. This combination allowed the monitor to sleep and come out of a sleep state perfectly. However, I just updated the NUC6i7KYK's firmware and the Intel video drivers at the same time (DOH!) and now I can no longer get the monitor to come out of sleep. I have to power down the NUC6i7KYK - it is the only way to rectify. I have no video issues, that is all fine - but the sleep functionality that was working perfectly is now severely broken.
Again, since I installed the latest NUC6i7KYK firmware and updated the video drivers at the same time, I can't pinpoint the problem - but it is definitely one or the other.
NUC6i7KYK BIOS - 0037
Report Date: Tuesday, August 2, 2016
Report Time [hh:mm:ss]: 7:53:00 AM
Driver Version: 188.8.131.5281
Operating System: Windows* 10 Enterprise (10.0.10586)
Physical Memory: 32657 MB
Vendor ID: 8086
Device ID: 193B
Device Revision: 09
Video BIOS: 1040.0
Current Resolution: 2560 x 1440
Intel Abandoned this thread months ago Ego.
Which Driver would that be?