Actually, I do remember doing something to my NUC, I increased the memory allocated to the GFX in the BIOS. I cant remember what I increased it to but it was far more than the default (it was 32Mb by default), I have no idea why I did this other than "its what I would normally do with onboard GFX and I have boat loads of RAM".
Sorry for my late reply, I realize it has been over a month.
I've tried every possible solution in this topic. Upgraded to the latest 7.90 alpha, which didn't solve the problem. Checked every device for its CEC settings but it was disabled on all devices.
Eventually, I found the solution to my problem. I've changed some settings in UEFI:
- Video memory and aperture both to 512MB
- Primary video output fixed to HDMI (instead of auto)
- Secondary video output fixed to VGA
- Intel Dynamic Power Technology switched off
Too much changes to really pinpoint the exact solution but it seems to work. The current uptime is over 8 days.
Thanks all for your support! I'm going to update to the latest beta now instead of the 7.90.010 alpha