[    2.412673] drm: loading out-of-tree module taints kernel.
[    2.412889] drm: module verification failed: signature and/or required key 
missing - tainting kernel
...
[    2.445205] i915: Unknown symbol drm_mm_init_scan_with_range (err 0)
[    2.445267] i915: Unknown symbol drm_kms_helper_poll_enable_locked (err 0)
[    2.445327] i915: Unknown symbol drm_crtc_get_hv_timing (err 0)
[    2.445574] i915: Unknown symbol drm_mm_init_scan (err 0)
[    2.445627] i915: Unknown symbol drm_mm_insert_node_in_range_generic (err 0)

Seems like you were loading out-of-tree i915.

What's the output of `modinfo i915`?

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https://bugs.launchpad.net/bugs/1722536

Title:
  Displays not properly recognized after upgrading kernel to
  4.10.0-37-generic

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