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[4.4-rc1][Regression] drm/i915: Check live status before reading edid

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Hi Sonika,

A kernel bug report was opened against Ubuntu [0].  After a kernel
bisect, it was found that reverting the following commit resolved this bug:

commit 237ed86c693d8a8e4db476976aeb30df4deac74b
Author: Sonika Jindal <sonika.jindal@intel.com>
Date:   Tue Sep 15 09:44:20 2015 +0530

    drm/i915: Check live status before reading edid



The regression was introduced as of v4.4-rc1.

I was hoping to get your feedback, since you are the patch author.  Do
think increasing the number of tries in intel_hdmi_detect() is worth
trying?  Do you think gathering any additional data will help diagnose
this issue, or would it be best to submit a revert request?
    

Thanks,
    
Joe

[0] http://pad.lv/lp1543683

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[4.4-rc1][Regression] drm/i915: Check live status before reading edid Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-02-24 22:40 +0100
  RE: [4.4-rc1][Regression] drm/i915: Check live status before  reading edid "Jindal, Sonika" <sonika.jindal@intel.com> - 2016-02-25 05:00 +0100
    Re: [4.4-rc1][Regression] drm/i915: Check live status before reading  edid Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-02-25 19:50 +0100
      Re: [4.4-rc1][Regression] drm/i915: Check live status before reading  edid "Jindal, Sonika" <sonika.jindal@intel.com> - 2016-02-26 07:10 +0100
  Re: [4.4-rc1][Regression] drm/i915: Check live status before reading edid Jani Nikula <jani.nikula@linux.intel.com> - 2016-02-29 10:40 +0100
    Re: [4.4-rc1][Regression] drm/i915: Check live status before reading  edid Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-03-02 23:00 +0100

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