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[Bug 1504584]

 

I'm having the same problem with 4.3, skipped few versions before that.
However, I seem to have found an earlier bug that could be related, at
least it sounds similar:
https://bugs.freedesktop.org/show_bug.cgi?id=90253

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https://bugs.launchpad.net/bugs/1504584

Title:
  As of kernel 4.3-rc1 system will not stay in S3 suspend

Status in Linux:
  Confirmed
Status in linux package in Ubuntu:
  Triaged

Bug description:
  Note: this bug report is just for local tracking of an upstream issue:
  Reference: http://lists.freedesktop.org/archives/intel-gfx/2015-October/077592.html

  also copied below:

  This started somewhere between Kernel 4.2 and 4.3-rc1,
  but I only noticed it a day ago.

  The first S3 suspend after a fresh boot works fine.
  Thereafter, suspends simply resume again immediately.

  I get the following errors on my console:

  [  152.697247] i915 0000:00:02.0: GEM idle failed, resume might fail
  [  152.697258] pci_pm_suspend(): i915_pm_suspend+0x0/0x50 [i915] returns -11
  [  152.697262] dpm_run_callback(): pci_pm_suspend+0x0/0x140 returns -11
  [  152.697264] PM: Device 0000:00:02.0 failed to suspend async: error -11
  [  152.697306] PM: Some devices failed to suspend, or early wake event detected

  The issue is not limited to my normal way of doing suspend, using "pm-suspend".
  It also happens using the "echo mem > /sys/power/state" method.

  The kernel was bisected, and the result was double checked by clean compiles
  of the first bad commit and the immediately preceding commit. Bisect results
  copied below:

  $ git bisect good
  dc4be6071a24f0d2da6af8ce16c19f276ac4d7a2 is the first bad commit
  commit dc4be6071a24f0d2da6af8ce16c19f276ac4d7a2
  Author: John Harrison <John.C.Harrison@xxxxxxxxx>
  Date:   Fri May 29 17:43:39 2015 +0100

      drm/i915: Add explicit request management to i915_gem_init_hw()

      Now that a single per ring loop is being done for all the different
      intialisation steps in i915_gem_init_hw(), it is possible to add proper request
      management as well. The last remaining issue is that the context enable call
      eventually ends up within *_render_state_init() and this does its own private
      _i915_add_request() call.

      This patch adds explicit request creation and submission to the top level loop
      and removes the add_request() from deep within the sub-functions.

      v2: Updated for removal of batch_obj from add_request call in
  previous patch.

      For: VIZ-5115
      Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
      Reviewed-by: Tomas Elf <tomas.elf@xxxxxxxxx>
      Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>

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References