I'm running several version of Ubuntu (from 19.04 to 20.04) and 95% of time, I don't see GRUB during boot.
In fact, I don't even see the NUC splash screen that tells me when to press key to access Setup, etc...
If I do a hard reboot (shutdown, press power button for 4 second), all is showing correctly.
When switching from Windows to Linux or vice-versa, sometimes GRUB is showing. After upgrading to Ubuntu 20.04, GRUB was displayed, only once.
This is kind of annoying.
I tried HDMI and DisplayPort, no difference so far.
Is there any specific option to pass in GRUB while using NUC8I7HVK2 ?
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The validated operating system for this Intel® NUC Kit NUC8i7HVK is Windows 10 64bits and we handle stand-alone installations, for further assistance regarding Ubuntu* and please contact Linux* Support for Intel® NUC.
Intel Customer Support Technician