I have sporadic HDMI issues with my DC3217IYE when it's connected over an AVR receiver (Denon AVR 4311) to my LCD TV (Sony X4500) and the receiver is in HDMI-passthrough mode (standby). Every now and then, the screen goes black for a short while and the TV displays the HDMI input - just as the input was disconnected for a while or the resolution changed.
When I connect the NUC directly to the TV or when I switch on the receiver (instead of standby passthrough), this doesn't seem to happen. Also I never observed this when I play a video or game on the NUC. Indeed it happens always while surfing or even when the desktop is completely idle.
I tried different cables and HDMI inputs on the TV as well as HDMI inputs and ouputs on the receiver. Also I tried to disable CEC on the TV, enabled/disabled more or less every feature in the settings of the HD4000 driver including different refresh rates from 24p to 60p. However, sooner or later I get the issue.
Drivers and BIOS are updated with the newest versions. Also the AV-Receiver has the latest available firmware update.
As a side note: I used the HDMI-passthrough in standby for quite a quile with different devices and never observed this issue.
It happens only with the NUC.
System info:
Sony X4500 HD-TV via HDMI (Full-HD)
Denon AVR 4311 via HDMI (HDMI passthrough in standby enabled)
Win 7 Pro
Graphics Driver: 9.17.10.2932
Chipsset driver: 9.3.0.1026
BIOS Update: GKPPT10H.86A
Note: I can work around this by connecting both HDMI outputs and connecting one to the AVR receiver (to watch movies etc. with surround sound) and one directly to the TV to surf etc. without the described issue and without having to fully switch on the receiver. Yet when activating the second display (clone feature), the NUC idle consumption is increased by 1-2W which I want to avoid since its main purpose is a low-energy MP3 sever.
So I currently use STRG-ALT-F4 to switch HDMI outputs (blindly) which seems to be an acceptable workaround. Yet I still hope there is a solution for the issue so I don't need to work around it any more...