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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 1595803

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/1595803

Title:
  [i915_bpo][SKL] Display core init/uninit updates

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  At the moment, our i915_bpo driver on Vivid (kernel version:
  Ubuntu-3.19.0-62.70) lacks certain patches which fix the display core
  init/uninit sequence esp. handling dmc firmware loading and runtime-
  pm. Following patches from v4.5-rc1 address these issues on SKL.

  * e8ca932 drm/i915: Extract a intel_power_well_enable() function
  * dcddab3 drm/i915: Extract a intel_power_well_disable() function
  * 0a9d2be drm/i915/skl: Making DC6 entry is the last call in suspend flow.
  * 18a04a7 drm/i915: Kill intel_runtime_pm_disable()
  * ebae38d drm/i915/gen9: csr_init after runtime pm enable
  * 01a6908 drm/i915: use correct power domain for csr loading
  * bffbcd9 drm/i915/gen9: Don't try to load garbage dmc firmware on resume
  * ca1283d drm/i915/skl: Removed assert for csr-fw-loading check during disabling dc6
  * 56fcfd6 drm/i915: fix the power well ID for always on wells
  * fc17f22 drm/i915: fix lookup_power_well for power wells without any domain
  * 2f693e2 drm/i915: Make turning on/off PW1 and Misc I/O part of the init/fini sequences

  These patches also fix OEM bug related to audio not working after
  suspend by close/open lid.

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