Hello Martin, thanks a lot for choosing our products.
It is very important to inform you that we provide support and drivers for Windows Operating system, however many customers has reported compatibility with some Linux flavors.
The following link will provide you more information about it.
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Since there are probably some more people who want to know this and stumble onto this page / forum while googling:
Yes, it works perfectly with Ubuntu 14.04 on a DN2820FYKH here without any workarounds!
My SSD is an OCZ Vertex 2 I had lying around somewhere.
Set up the box with a monitor attached. If you reboot it without a HDMI cable attached, it will remember the last video resolution, and in VNC you will get an output in that size.
For the built-in VNC working with the usual VNC clients like UltraVNC or TightVNC you need to switch off "require-encryption" in dconf editor (org -> gnome -> desktop -> remote acess) because Vino has an unusual encryption method.
And if you want external HDDs to sleep after an interval of inactivity, hdparm doesn't work, you have to use the service hd-idle (not preinstalled).
I found that unfortunately there is a problem with the UEFI BIOS and the Ubuntu bootloader / GRUB.
The boot files which are stored on the hidden EFI partition of the boot drive are not recognized properly by the BIOS.
Even worse: If you have a running and booting system and then via system update do a GRUB update, the boot is broken again!
I spent a few hours to find a solution, and best up to now is a workaround found here:
This way booting the NUC needs a bit longer, but it least all is working and it should survive a GRUB update.
Hopefully Intel will release a fixed BIOS version soon...
I have the DN2820FYKH, I updated to latest BIOS updated 0039, and the NUC don't boot anymore headless. I tried the dummy HDMI to VGA adapted to lure him into there is a display wired, but no luck (althrough it is working with my main computer).
I am going back to rev 0034. Hopefully intel will solve this bug some day.