Created attachment 125722 [details] kernel log kernel: Happens with kernel 4.8-rc1 No issues with 4.7 kernel. Hardware: intel NUC6i5SY Once this bug is hit graphics there is no output on the display port at all. kernel log attached:
I tried with 4.8 rc4. While I still get no graphics output on the display port - switching to a virtual terminal works - the font is small (monitor is Dell 4K) but i get a prompt and can login fine.
Update - using 4.8.rc8 - same problem. I want to add however, that rebooting (hot or cold) repeatedly will eventually get graphics working - so it feels like a race of some kind. I do not see on this on any non skylake machines (tested 7 different machines). g
Update: Multiple boots still needed using 4.8.1 kernel - to graphics output. Seems like a timing issue? Enough cold reboots will eventually get graphics working and after that it seems totally fine. Its just getting it booted up with graphics.
commit c45eb4fed12d278d3619f1904885bd0d7bcbf036 [4.8-rc2] Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Wed Jul 13 18:34:45 2016 +0100 drm/i915/fbdev: Check for the framebuffer before use
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