[Bug 94929] unplug and replug HDMI ，the HDMI not display in Xwindows

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94929

--- Comment #5 from yuechao.zhao <yuechao.zhao at advantech.com.cn> ---
(In reply to anusha from comment #3)
> Can you give me the hardware configuration? I am trying on a NUC and a hp
> monitor.

(In reply to Chris Wilson from comment #4)
> xrandr --verbose for
> 
> 1. monitor plugged in,
> 2. monitor unplugged,
> 3. monitor plugged back
> 
> to confirm that the HDMI's connection is not being reported correctly.

(In reply to Chris Wilson from comment #4)
> xrandr --verbose for
> 
> 1. monitor plugged in,
> 2. monitor unplugged,
> 3. monitor plugged back
> 
> to confirm that the HDMI's connection is not being reported correctly.

I try it on text mode and modify drivers/gpu/drm/i915/intel_hotplug.c
                                 i915_hotplug_work_func{
                                      ......
                                      struct intel_encoder *intel_encoder;
                                      struct drm_connector *connector;
                                      bool changed = false;
                                      u32 hpd_event_bits;
                                      //add by me
                                      int i;
                                      for(i=0;i<1000;i++){
                                      udelay(1000);
                                      }//add end
                                      ......
                                 }

Then,the hotplug will be ok. But in Xwindows，unplug and replug HDMI，the HDMI
also not display.So,I doubt that is  Xwindow problem.

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