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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1547204

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1547204

Title:
  i915 several 'call traces' in dmesg

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu 16.04
  Kernel: Ubuntu 4.4.0-4.19-generic 4.4.1

  There are seven WARNINGS in dmesg during boot.
  dmesg | grep "cut here" -A 1
  [    5.916356] ------------[ cut here ]------------
  [    5.916450] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12147 intel_atomic_check+0x307/0x6d0 [i915]()
  --
  [    5.917586] ------------[ cut here ]------------
  [    5.917661] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:11695 intel_plane_atomic_calc_changes+0x549/0x6b0 [i915]()
  --
  [    5.996083] ------------[ cut here ]------------
  [    5.996176] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12724 intel_modeset_check_state+0x556/0x910 [i915]()
  --
  [    6.100769] ------------[ cut here ]------------
  [    6.100853] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12147 intel_atomic_check+0x307/0x6d0 [i915]()
  --
  [    6.336057] ------------[ cut here ]------------
  [    6.336151] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12724 intel_modeset_check_state+0x556/0x910 [i915]()
  --
  [    6.338439] ------------[ cut here ]------------
  [    6.338516] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/i915/intel_fbdev.c:406 intel_fb_initial_config+0x2e4/0x5f0 [i915]()
  --
  [    6.342397] ------------[ cut here ]------------
  [    6.342413] WARNING: CPU: 0 PID: 47 at /build/linux-IIZPYL/linux-4.4.0/drivers/gpu/drm/drm_atomic_helper.c:682 drm_atomic_helper_update_legacy_modeset_state+0x26a/0x280 [drm_kms_helper]()

  Happens also with mainline kernel 4.4.1-040401-generic.

  Doesn't happen with mainline kernel  4.2.0-040200-generic.

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