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    <body><span class="vcard"><a class="email" href="mailto:krisman@collabora.co.uk" title="krisman@collabora.co.uk">krisman@collabora.co.uk</a>
</span> changed
          <a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - [HSW] no Intel HDMI video output with kernel 4.4 and 4.9"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=101302">bug 101302</a>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Assignee</td>
           <td>intel-gfx-bugs@lists.freedesktop.org
           </td>
           <td>krisman@collabora.co.uk
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>REOPENED
           </td>
           <td>ASSIGNED
           </td>
         </tr></table>
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        <div>
            <b><a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - [HSW] no Intel HDMI video output with kernel 4.4 and 4.9"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=101302#c4">Comment # 4</a>
              on <a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED - [HSW] no Intel HDMI video output with kernel 4.4 and 4.9"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=101302">bug 101302</a>
              from <span class="vcard"><a class="email" href="mailto:krisman@collabora.co.uk" title="krisman@collabora.co.uk">krisman@collabora.co.uk</a>
</span></b>
        <pre>(In reply to <a href="mailto:stef@zechner77.de">stef@zechner77.de</a> from <a href="show_bug.cgi?id=101302#c3">comment #3</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=132026" name="attach_132026" title="dmesg output">attachment 132026</a> <a href="attachment.cgi?id=132026&action=edit" title="dmesg output">[details]</a></span>
> dmesg output

> I compiled latest drm-intel-nightly (SHA 18d562c9) and still get no image.

> I also attached the full dmesg output with "drm.debug=0xe log_buf_len=4M"</span >

Thanks for the information,

There are 3 things that caught my attention in your log:

1) The hotplug task is triggering every few seconds and (apparently)
successfully detecting the monitor attached to HDMI-A-3 every time.

2) After each detection, errors like this occur:

 [drm:intel_engine_cmd_parser [i915]] CMD: Rejected register 0x00002360 in
command: 0x11000001 (rcs0)
[   50.339786] [drm:intel_engine_cmd_parser [i915]] CMD: Rejected register
0x00002360 in command: 0x11000001 (rcs0)

3) Finally, we have:

 [drm:intel_prepare_plane_fb [i915]] failed to pin object

Which doesn't seem related to the rest.  

Since the monitor is identified and the connector modes are successfully
probed,  I want to start by figuring out what made the register value to be
rejected.</pre>
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