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I installed Ubuntu Linux 15.10 from a USB thumb drive on my NUC6i5SYK. I had to add nomodeset to get the LiveCD environment to boot, as the display would sleep if I didn't (as described here: Intel NUC NUC5i5RYH - Boot - only mouse pointer appears (Xubuntu 14.04, 14.10) - Ask Ubuntu and other places). I was able to successfully install Ubuntu from the LiveCD environment. Now I see the same issue with the installed version, i.e. it gets to the purple background and the display immediately sleeps. I'm connecting to a Dell U3415W via mini-DisplayPort.

I can boot the recovery mode GRUB menu item and then select resume the normal boot and it appears to work fine. Yet it consistently puts the display to sleep with a normal boot.

Things I've tried that haven't resolved the issue:

  1. Adding i915.preliminary_hw_support=1 to GRUB boot configuration, per Early Intel Skylake Linux Users May Run Into A Silly Issue - Phoronix and other sources

  2. Updating Intel Linux Graphics drivers to latest Ubuntu release Intel Graphics Installer for Linux* 1.2.1 | 01.org

  3. Installing Kernel 4.3 drivers - No version of Ubuntu can be installed with any Skylake 6th generation Intel processor - Ask Ubuntu

  4. Installing Kernel 4.4 drivers with the missing Skylake firmware file Installing 4.4 rc7 kernel yields i915 module not available

Any ideas?

  • I was able to get it booted into Ubuntu using nomodeset. Would still like to get the graphics drivers working properly. – phireph0x Jan 30 '16 at 4:06
  • When I connected via HDMI instead of mini-DisplayPort, Ubuntu booted normally. Sound was working as well, which wasn't working with the DisplayPort interface, in addition to the issue described above. – phireph0x Feb 5 '16 at 23:41
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I had the same issues as you. I have a Dell U3415w monitor, and when I disabled DP1.2 in the OSD, it worked fine. Both picture and sound.

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