Re: ✗ Fi.CI.IGT: failure for drm/i915: Add support for asynchronous display power disabling

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Quoting Imre Deak (2019-05-03 11:07:55)
> On Fri, May 03, 2019 at 07:50:26AM +0000, Patchwork wrote:
> > == Series Details ==
> > 
> > Series: drm/i915: Add support for asynchronous display power disabling
> > URL   : https://patchwork.freedesktop.org/series/60242/
> > State : failure
> > 
> > == Summary ==
> > 
> > CI Bug Log - changes from CI_DRM_6032_full -> Patchwork_12955_full
> > ====================================================
> > 
> > Summary
> > -------
> > 
> >   **FAILURE**
> > 
> >   Serious unknown changes coming with Patchwork_12955_full absolutely need to be
> >   verified manually.
> >   
> >   If you think the reported changes have nothing to do with the changes
> >   introduced in Patchwork_12955_full, please notify your bug team to allow them
> >   to document this new failure mode, which will reduce false positives in CI.
> > 
> >   
> > 
> > Possible new issues
> > -------------------
> > 
> >   Here are the unknown changes that may have been introduced in Patchwork_12955_full:
> > 
> > ### IGT changes ###
> > 
> > #### Possible regressions ####
> > 
> >   * igt@gem_persistent_relocs@forked-interruptible-thrashing:
> >     - shard-glk:          [PASS][1] -> [TIMEOUT][2]
> >    [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6032/shard-glk6/igt@gem_persistent_relocs@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> >    [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_12955/shard-glk7/igt@gem_persistent_relocs@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> 
> Looks like an unrelated issue: on this GLK there are two HDMI displays
> connected, so the change shouldn't make any diffence on it. The change
> only affects the DP detect and hotplug paths, where we'll do now an
> async power domain put.

There's no history of glk locking up there, 

> The machine is still up when the problem happens, the test seems to get
> stuck and aborted by the test runner (after ~6mins according to [1]).
> 
> [43/82] (762s left) gem_persistent_relocs (forked-interruptible-thrashing)
> Starting subtest: forked-interruptible-thrashing
> Timeout. Killing the current test with SIGQUIT.
> Timeout. Killing the current test with SIGKILL.

and yet it locked up sufficiently to not respond to a signal, suggesting
an oops (the test takes 3s normally on glk).
-Chris
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